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#!/usr/bin/env perl
# mysqltuner.pl - Version 1.5.0
# High Performance MySQL Tuning Script
# Copyright (C) 2006-2015 Major Hayden - major@mhtx.net
#
# For the latest updates, please visit http://mysqltuner.com/
# Git repository available at http://github.com/major/MySQLTuner-perl
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# This project would not be possible without help from:
# Matthew Montgomery Paul Kehrer Dave Burgess
# Jonathan Hinds Mike Jackson Nils Breunese
# Shawn Ashlee Luuk Vosslamber Ville Skytta
# Trent Hornibrook Jason Gill Mark Imbriaco
# Greg Eden Aubin Galinotti Giovanni Bechis
# Bill Bradford Ryan Novosielski Michael Scheidell
# Blair Christensen Hans du Plooy Victor Trac
# Everett Barnes Tom Krouper Gary Barrueto
# Simon Greenaway Adam Stein Isart Montane
# Baptiste M. Cole Turner Major Hayden
# Joe Ashcraft Jean-Marie Renouard
#
# Inspired by Matthew Montgomery's tuning-primer.sh script:
# http://forge.mysql.com/projects/view.php?id=44
#
use strict;
use warnings;
use diagnostics;
use File::Spec;
use Getopt::Long;
use File::Basename;
use Cwd 'abs_path';
use Data::Dumper qw/Dumper/;
#use JSON;
# Set up a few variables for use in the script
my $tunerversion = "1.5.0";
my (@adjvars, @generalrec);
# Set defaults
my %opt = (
"nobad" => 0,
"nogood" => 0,
"noinfo" => 0,
"debug" => 0,
"nocolor" => 0,
"forcemem" => 0,
"forceswap" => 0,
"host" => 0,
"socket" => 0,
"port" => 0,
"user" => 0,
"pass" => 0,
"skipsize" => 0,
"checkversion" => 0,
"buffers" => 0,
"passwordfile" => 0,
"reportfile" => 0,
"dbstat" => 0,
"idxstat" => 0,
"skippassword" => 0,
);
# Gather the options from the command line
GetOptions(\%opt,
'nobad',
'nogood',
'noinfo',
'debug',
'nocolor',
'forcemem=i',
'forceswap=i',
'host=s',
'socket=s',
'port=i',
'user=s',
'pass=s',
'skipsize',
'checkversion',
'mysqladmin=s',
'mysqlcmd=s',
'help',
'buffers',
'skippassword',
'passwordfile=s',
'reportfile=s',
'silent',
'dbstat',
'idxstat',
);
if (defined $opt{'help'} && $opt{'help'} == 1) { usage(); }
sub usage {
# Shown with --help option passed
print " MySQLTuner $tunerversion - MySQL High Performance Tuning Script\n".
" Bug reports, feature requests, and downloads at http://mysqltuner.com/\n".
" Maintained by Major Hayden (major\@mhtx.net) - Licensed under GPL\n".
"\n".
" Important Usage Guidelines:\n".
" To run the script with the default options, run the script without arguments\n".
" Allow MySQL server to run for at least 24-48 hours before trusting suggestions\n".
" Some routines may require root level privileges (script will provide warnings)\n".
" You must provide the remote server's total memory when connecting to other servers\n".
"\n".
" Connection and Authentication\n".
" --host <hostname> Connect to a remote host to perform tests (default: localhost)\n".
" --socket <socket> Use a different socket for a local connection\n".
" --port <port> Port to use for connection (default: 3306)\n".
" --user <username> Username to use for authentication\n".
" --pass <password> Password to use for authentication\n".
" --mysqladmin <path> Path to a custom mysqladmin executable\n".
" --mysqlcmd <path> Path to a custom mysql executable\n".
"\n".
" Performance and Reporting Options\n".
" --skipsize Don't enumerate tables and their types/sizes (default: on)\n".
" (Recommended for servers with many tables)\n".
" --skippassword Don't perform checks on user passwords(default: off)\n".
" --checkversion Check for updates to MySQLTuner (default: don't check)\n".
" --forcemem <size> Amount of RAM installed in megabytes\n".
" --forceswap <size> Amount of swap memory configured in megabytes\n".
" --passwordfile <path>Path to a password file list(one password by line)\n".
" --reportfile <path> Path to a report txt file\n".
"\n".
" Output Options:\n".
" --nogood Remove OK responses\n".
" --nobad Remove negative/suggestion responses\n".
" --noinfo Remove informational responses\n".
" --debug Print debug information\n".
" --dbstat Print database information\n".
" --idxstat Print index information\n".
" --nocolor Don't print output in color\n".
" --buffers Print global and per-thread buffer values\n";
exit;
}
my $devnull = File::Spec->devnull();
my $basic_password_files=($opt{passwordfile} eq "0")? abs_path(dirname(__FILE__))."/basic_passwords.txt" : abs_path($opt{passwordfile}) ;
# for RPM distributions
$basic_password_files="/usr/share/mysqltuner/basic_passwords.txt" unless -f "$basic_password_files";
#
my $reportfile=undef;
$reportfile=abs_path($opt{reportfile}) unless $opt{reportfile} eq "0";
my $fh=undef;
open($fh, '>', $reportfile) or die("Fail opening $reportfile") if defined($reportfile);
$opt{nocolor} = 1 if defined($reportfile);
# Setting up the colors for the print styles
my $good = ($opt{nocolor} == 0)? "[\e[0;32mOK\e[0m]" : "[OK]" ;
my $bad = ($opt{nocolor} == 0)? "[\e[0;31m!!\e[0m]" : "[!!]" ;
my $info = ($opt{nocolor} == 0)? "[\e[0;34m--\e[0m]" : "[--]" ;
my $deb = ($opt{nocolor} == 0)? "[\e[0;31mDG\e[0m]" : "[DG]" ;
# Super sturucture containing all informations
my %result;
# Functions that handle the print styles
sub prettyprint {
print $_[0];
print $fh $_[0] if defined($fh);
}
sub goodprint { prettyprint $good." ".$_[0] unless ($opt{nogood} == 1); }
sub infoprint { prettyprint $info." ".$_[0] unless ($opt{noinfo} == 1); }
sub badprint { prettyprint $bad. " ".$_[0] unless ($opt{nobad} == 1); }
sub debugprint { prettyprint $deb. " ".$_[0] unless ($opt{debug} == 0); }
sub redwrap { return ($opt{nocolor} == 0) ? "\e[0;31m".$_[0]."\e[0m" : $_[0] ; }
sub greenwrap { return ($opt{nocolor} == 0) ? "\e[0;32m".$_[0]."\e[0m" : $_[0] ; }
# Calculates the parameter passed in bytes, and then rounds it to one decimal place
sub hr_bytes {
my $num = shift;
if ($num >= (1024**3)) { #GB
return sprintf("%.1f",($num/(1024**3)))."G";
} elsif ($num >= (1024**2)) { #MB
return sprintf("%.1f",($num/(1024**2)))."M";
} elsif ($num >= 1024) { #KB
return sprintf("%.1f",($num/1024))."K";
} else {
return $num."B";
}
}
# Calculates the parameter passed in bytes, and then rounds it to the nearest integer
sub hr_bytes_rnd {
my $num = shift;
if ($num >= (1024**3)) { #GB
return int(($num/(1024**3)))."G";
} elsif ($num >= (1024**2)) { #MB
return int(($num/(1024**2)))."M";
} elsif ($num >= 1024) { #KB
return int(($num/1024))."K";
} else {
return $num."B";
}
}
# Calculates the parameter passed to the nearest power of 1000, then rounds it to the nearest integer
sub hr_num {
my $num = shift;
if ($num >= (1000**3)) { # Billions
return int(($num/(1000**3)))."B";
} elsif ($num >= (1000**2)) { # Millions
return int(($num/(1000**2)))."M";
} elsif ($num >= 1000) { # Thousands
return int(($num/1000))."K";
} else {
return $num;
}
}
# Calculate Percentage
sub percentage{
my $value=shift;
my $total=shift;
$total=0 unless defined $total;
return 100,00 if $total == 0;
return sprintf("%.2f", ($value*100/$total) );
}
# Calculates uptime to display in a more attractive form
sub pretty_uptime {
my $uptime = shift;
my $seconds = $uptime % 60;
my $minutes = int(($uptime % 3600) / 60);
my $hours = int(($uptime % 86400) / (3600));
my $days = int($uptime / (86400));
my $uptimestring;
if ($days > 0) {
$uptimestring = "${days}d ${hours}h ${minutes}m ${seconds}s";
} elsif ($hours > 0) {
$uptimestring = "${hours}h ${minutes}m ${seconds}s";
} elsif ($minutes > 0) {
$uptimestring = "${minutes}m ${seconds}s";
} else {
$uptimestring = "${seconds}s";
}
return $uptimestring;
}
# Retrieves the memory installed on this machine
my ($physical_memory,$swap_memory,$duflags);
sub os_setup {
sub memerror {
badprint "Unable to determine total memory/swap; use '--forcemem' and '--forceswap'\n";
exit;
}
my $os = `uname`;
$duflags = ($os =~ /Linux/) ? '-b' : '';
if ($opt{'forcemem'} > 0) {
$physical_memory = $opt{'forcemem'} * 1048576;
infoprint "Assuming $opt{'forcemem'} MB of physical memory\n";
if ($opt{'forceswap'} > 0) {
$swap_memory = $opt{'forceswap'} * 1048576;
infoprint "Assuming $opt{'forceswap'} MB of swap space\n";
} else {
$swap_memory = 0;
badprint "Assuming 0 MB of swap space (use --forceswap to specify)\n";
}
} else {
if ($os =~ /Linux/) {
$physical_memory = `LANG=en free -b | grep Mem | awk '{print \$2}'` or memerror;
$swap_memory = `LANG=en free -b | grep Swap | awk '{print \$2}'` or memerror;
} elsif ($os =~ /Darwin/) {
$physical_memory = `sysctl -n hw.memsize` or memerror;
$swap_memory = `sysctl -n vm.swapusage | awk '{print \$3}' | sed 's/\..*\$//'` or memerror;
} elsif ($os =~ /NetBSD|OpenBSD|FreeBSD/) {
$physical_memory = `sysctl -n hw.physmem` or memerror;
if ($physical_memory < 0) {
$physical_memory = `sysctl -n hw.physmem64` or memerror;
}
$swap_memory = `swapctl -l | grep '^/' | awk '{ s+= \$2 } END { print s }'` or memerror;
} elsif ($os =~ /BSD/) {
$physical_memory = `sysctl -n hw.realmem` or memerror;
$swap_memory = `swapinfo | grep '^/' | awk '{ s+= \$2 } END { print s }'`;
} elsif ($os =~ /SunOS/) {
$physical_memory = `/usr/sbin/prtconf | grep Memory | cut -f 3 -d ' '` or memerror;
chomp($physical_memory);
$physical_memory = $physical_memory*1024*1024;
} elsif ($os =~ /AIX/) {
$physical_memory = `lsattr -El sys0 | grep realmem | awk '{print \$2}'` or memerror;
chomp($physical_memory);
$physical_memory = $physical_memory*1024;
$swap_memory = `lsps -as | awk -F"(MB| +)" '/MB /{print \$2}'` or memerror;
chomp($swap_memory);
$swap_memory = $swap_memory*1024*1024;
}
}
chomp($physical_memory);
chomp($swap_memory);
chomp($os);
$result{'OS'}{'OS Type'}=$os;
$result{'OS'}{'Physical Memory'}{'bytes'}=$physical_memory;
$result{'OS'}{'Physical Memory'}{'pretty'}=hr_bytes($physical_memory);
$result{'OS'}{'Swap Memory'}{'bytes'}=$swap_memory;
$result{'OS'}{'Swap Memory'}{'pretty'}=hr_bytes($swap_memory);
}
# Checks to see if a MySQL login is possible
my ($mysqllogin,$doremote,$remotestring,$mysqlcmd,$mysqladmincmd);
sub mysql_setup {
$doremote = 0;
$remotestring = '';
if ($opt{mysqladmin}) {
$mysqladmincmd = $opt{mysqladmin};
} else {
$mysqladmincmd = `which mysqladmin`;
}
chomp($mysqladmincmd);
if (! -e $mysqladmincmd && $opt{mysqladmin}) {
badprint "Unable to find the mysqladmin command you specified: ".$mysqladmincmd."\n";
exit;
} elsif (! -e $mysqladmincmd) {
badprint "Couldn't find mysqladmin in your \$PATH. Is MySQL installed?\n";
exit;
}
if ($opt{mysqlcmd}) {
$mysqlcmd = $opt{mysqlcmd};
} else {
$mysqlcmd = `which mysql`;
}
chomp($mysqlcmd);
if (! -e $mysqlcmd && $opt{mysqlcmd}) {
badprint "Unable to find the mysql command you specified: ".$mysqlcmd."\n";
exit;
} elsif (! -e $mysqlcmd) {
badprint "Couldn't find mysql in your \$PATH. Is MySQL installed?\n";
exit;
}
# Are we being asked to connect via a socket?
if ($opt{socket} ne 0) {
$remotestring = " -S $opt{socket}";
}
# Are we being asked to connect to a remote server?
if ($opt{host} ne 0) {
chomp($opt{host});
$opt{port} = ($opt{port} eq 0)? 3306 : $opt{port} ;
# If we're doing a remote connection, but forcemem wasn't specified, we need to exit
if ($opt{'forcemem'} eq 0) {
badprint "The --forcemem option is required for remote connections\n";
exit;
}
infoprint "Performing tests on $opt{host}:$opt{port}\n";
$remotestring = " -h $opt{host} -P $opt{port}";
$doremote = 1;
}
# Did we already get a username and password passed on the command line?
if ($opt{user} ne 0 and $opt{pass} ne 0) {
$mysqllogin = "-u $opt{user} -p'$opt{pass}'".$remotestring;
my $loginstatus = `$mysqladmincmd ping $mysqllogin 2>&1`;
if ($loginstatus =~ /mysqld is alive/) {
goodprint "Logged in using credentials passed on the command line\n";
return 1;
} else {
badprint "Attempted to use login credentials, but they were invalid\n";
exit 0;
}
}
my $svcprop = `which svcprop 2>/dev/null`;
if (substr($svcprop, 0, 1) =~ "/") {
# We are on solaris
(my $mysql_login = `svcprop -p quickbackup/username svc:/network/mysql-quickbackup:default`) =~ s/\s+$//;
(my $mysql_pass = `svcprop -p quickbackup/password svc:/network/mysql-quickbackup:default`) =~ s/\s+$//;
if ( substr($mysql_login, 0, 7) ne "svcprop" ) {
# mysql-quickbackup is installed
$mysqllogin = "-u $mysql_login -p$mysql_pass";
my $loginstatus = `mysqladmin $mysqllogin ping 2>&1`;
if ($loginstatus =~ /mysqld is alive/) {
goodprint "Logged in using credentials from mysql-quickbackup.\n";
return 1;
} else {
badprint "Attempted to use login credentials from mysql-quickbackup, but they failed.\n";
exit 0;
}
}
} elsif ( -r "/etc/psa/.psa.shadow" and $doremote == 0 ) {
# It's a Plesk box, use the available credentials
$mysqllogin = "-u admin -p`cat /etc/psa/.psa.shadow`";
my $loginstatus = `$mysqladmincmd ping $mysqllogin 2>&1`;
unless ($loginstatus =~ /mysqld is alive/) {
badprint "Attempted to use login credentials from Plesk, but they failed.\n";
exit 0;
}
} elsif ( -r "/usr/local/directadmin/conf/mysql.conf" and $doremote == 0 ){
# It's a DirectAdmin box, use the available credentials
my $mysqluser=`cat /usr/local/directadmin/conf/mysql.conf | egrep '^user=.*'`;
my $mysqlpass=`cat /usr/local/directadmin/conf/mysql.conf | egrep '^passwd=.*'`;
$mysqluser =~ s/user=//;
$mysqluser =~ s/[\r\n]//;
$mysqlpass =~ s/passwd=//;
$mysqlpass =~ s/[\r\n]//;
$mysqllogin = "-u $mysqluser -p$mysqlpass";
my $loginstatus = `mysqladmin ping $mysqllogin 2>&1`;
unless ($loginstatus =~ /mysqld is alive/) {
badprint "Attempted to use login credentials from DirectAdmin, but they failed.\n";
exit 0;
}
} elsif ( -r "/etc/mysql/debian.cnf" and $doremote == 0 ){
# We have a debian maintenance account, use it
$mysqllogin = "--defaults-file=/etc/mysql/debian.cnf";
my $loginstatus = `$mysqladmincmd $mysqllogin ping 2>&1`;
if ($loginstatus =~ /mysqld is alive/) {
goodprint "Logged in using credentials from debian maintenance account.\n";
return 1;
} else {
badprint "Attempted to use login credentials from debian maintenance account, but they failed.\n";
exit 0;
}
} else {
# It's not Plesk or debian, we should try a login
debugprint "$mysqladmincmd $remotestring ping 2>&1";
my $loginstatus = `$mysqladmincmd $remotestring ping 2>&1`;
if ($loginstatus =~ /mysqld is alive/) {
# Login went just fine
$mysqllogin = " $remotestring ";
# Did this go well because of a .my.cnf file or is there no password set?
my $userpath = `printenv HOME`;
if (length($userpath) > 0) {
chomp($userpath);
}
unless ( -e "${userpath}/.my.cnf" or -e "${userpath}/.mylogin.cnf" ) {
badprint "Successfully authenticated with no password - SECURITY RISK!\n";
}
return 1;
} else {
print STDERR "Please enter your MySQL administrative login: ";
my $name = <>;
print STDERR "Please enter your MySQL administrative password: ";
system("stty -echo >$devnull 2>&1");
my $password = <>;
system("stty echo >$devnull 2>&1");
chomp($password);
chomp($name);
$mysqllogin = "-u $name";
if (length($password) > 0) {
$mysqllogin .= " -p'$password'";
}
$mysqllogin .= $remotestring;
my $loginstatus = `$mysqladmincmd ping $mysqllogin 2>&1`;
if ($loginstatus =~ /mysqld is alive/) {
print STDERR "\n";
if (! length($password)) {
# Did this go well because of a .my.cnf file or is there no password set?
my $userpath = `ls -d ~`;
chomp($userpath);
unless ( -e "$userpath/.my.cnf" ) {
badprint "Successfully authenticated with no password - SECURITY RISK!\n";
}
}
return 1;
} else {
print "\n".$bad." Attempted to use login credentials, but they were invalid.\n";
exit 0;
}
exit 0;
}
}
}
# MySQL Request Array
sub select_array {
my $req=shift;
debugprint "PERFORM: $req \n";
my @result=`$mysqlcmd $mysqllogin -Bse "$req"`;
chomp (@result);
return @result;
}
# MySQL Request one
sub select_one {
my $req=shift;
debugprint "PERFORM: $req \n";
my $result=`$mysqlcmd $mysqllogin -Bse "$req"`;
chomp ($result);
return $result;
}
sub get_tuning_info {
my @infoconn = select_array "\\s";
my ($tkey, $tval);
@infoconn = grep {!/Threads:/ and !/Connection id:/ and !/pager:/ and !/Using/ } @infoconn;
foreach my $line (@infoconn) {
if ($line =~ /\s*(.*):\s*(.*)/) {
debugprint "$1 => $2\n";
$tkey=$1;
$tval=$2;
chomp($tkey);
chomp($tval);
$result{'MySQL Client'}{$tkey} = $tval;
}
}
$result{'MySQL Client'}{'Client Path'}=$mysqlcmd;
$result{'MySQL Client'}{'Admin Path'}=$mysqladmincmd;
$result{'MySQL Client'}{'Authentication Info'}=$mysqllogin;
}
# Populates all of the variable and status hashes
my (%mystat,%myvar,$dummyselect,%myrepl, %myslaves);
sub get_all_vars {
# We need to initiate at least one query so that our data is useable
$dummyselect = select_one "SELECT VERSION()";
debugprint "VERSION: ".$dummyselect."\n";
$result{'MySQL Client'}{'Version'}=$dummyselect;
my @mysqlvarlist = select_array "SHOW /*!50000 GLOBAL */ VARIABLES";
foreach my $line (@mysqlvarlist) {
$line =~ /([a-zA-Z_]*)\s*(.*)/;
$myvar{$1} = $2;
$result{'Variables'}{$1}=$2;
debugprint "V: $1 = $2\n";
}
my @mysqlstatlist = select_array "SHOW /*!50000 GLOBAL */ STATUS";
foreach my $line (@mysqlstatlist) {
$line =~ /([a-zA-Z_]*)\s*(.*)/;
$mystat{$1} = $2;
$result{'Status'}{$1}=$2;
debugprint "S: $1 = $2\n";
}
# Workaround for MySQL bug #59393 wrt. ignore-builtin-innodb
if (($myvar{'ignore_builtin_innodb'} || "") eq "ON") {
$myvar{'have_innodb'} = "NO";
}
# have_* for engines is deprecated and will be removed in MySQL 5.6;
# check SHOW ENGINES and set corresponding old style variables.
# Also works around MySQL bug #59393 wrt. skip-innodb
my @mysqlenginelist = select_array "SHOW ENGINES";
foreach my $line (@mysqlenginelist) {
if ($line =~ /^([a-zA-Z_]+)\s+(\S+)/) {
my $engine = lc($1);
if ($engine eq "federated" || $engine eq "blackhole") {
$engine .= "_engine";
} elsif ($engine eq "berkeleydb") {
$engine = "bdb";
}
my $val = ($2 eq "DEFAULT") ? "YES" : $2;
$myvar{"have_$engine"} = $val;
$result{'Storage Engines'}{$engine}=$2;
}
}
my @mysqlslave = select_array "SHOW SLAVE STATUS\\G";
foreach my $line (@mysqlslave) {
if ($line =~ /\s*(.*):\s*(.*)/) {
debugprint "$1 => $2\n";
$myrepl{"$1"} = $2;
$result{'Replication'}{'Status'}{$1}=$2;
}
}
#print Dumper(%myrepl);
#exit 0;
my @mysqlslaves = select_array "SHOW SLAVE HOSTS";
my @lineitems=();
foreach my $line (@mysqlslaves) {
debugprint "L: $line \n";
@lineitems=split /\s+/, $line;
$myslaves{$lineitems[0]}=$line;
$result{'Replication'}{'Slaves'}{$lineitems[0]}=$lineitems[4];
}
}
sub get_basic_passwords {
my $file=shift;
open (FH, "< $file") or die "Can't open $file for read: $!";
my @lines = <FH>;
close FH or die "Cannot close $file: $!";
return @lines
}
sub security_recommendations {
prettyprint "\n-------- Security Recommendations -------------------------------------------\n";
if ($opt{skippassword} eq 1) {
infoprint "Skipped due to --skippassword option\n";
return;
}
# Looking for Anonymous users
my @mysqlstatlist = select_array "SELECT CONCAT(user, '\@', host) FROM mysql.user WHERE TRIM(USER) = '' OR USER IS NULL";
if (@mysqlstatlist) {
foreach my $line (sort @mysqlstatlist) {
chomp($line);
badprint "User '".$line."' is an anonymous account.\n";
}
push(@generalrec, "Remove Anonymous User account - there is ".scalar(@mysqlstatlist). " Anonymous account.");
} else {
goodprint "There is no anonymous account in all database users\n";
}
# Looking for Empty Password
@mysqlstatlist = select_array "SELECT CONCAT(user, '\@', host) FROM mysql.user WHERE password = '' OR password IS NULL";
if (@mysqlstatlist) {
foreach my $line (sort @mysqlstatlist) {
chomp($line);
badprint "User '".$line."' has no password set.\n";
}
push(@generalrec, "Set up a Password for user with the following SQL statement ( SET PASSWORD FOR 'user'\@'SpecificDNSorIp' = PASSWORD('secure_password'); )");
} else {
goodprint "All database users have passwords assigned\n";
}
# Looking for User with user/ uppercase /capitalise user as password
@mysqlstatlist = select_array "SELECT CONCAT(user, '\@', host) FROM mysql.user WHERE CAST(password as Binary) = PASSWORD(user) OR CAST(password as Binary) = PASSWORD(UPPER(user)) OR CAST(password as Binary) = PASSWORD(UPPER(LEFT(User, 1)) + SUBSTRING(User, 2, LENGTH(User)))";
if (@mysqlstatlist) {
foreach my $line (sort @mysqlstatlist) {
chomp($line);
badprint "User '".$line."' has user name as password.\n";
}
push(@generalrec, "Set up a Secure Password for user\@host ( SET PASSWORD FOR 'user'\@'SpecificDNSorIp' = PASSWORD('secure_password'); )");
}
@mysqlstatlist = select_array "SELECT CONCAT(user, '\@', host) FROM mysql.user WHERE HOST='%'";
if (@mysqlstatlist) {
foreach my $line (sort @mysqlstatlist) {
chomp($line);
badprint "User '".$line."' hasn't specific host restriction.\n";
}
push(@generalrec, "Restrict Host for user\@% to user\@SpecificDNSorIp");
}
unless (-f $basic_password_files) {
badprint "There is not basic password file list !\n";
return;
}
my @passwords=get_basic_passwords $basic_password_files;
infoprint "There is ". scalar(@passwords). " basic passwords in the list.\n";
my $nbins=0;
my $passreq;
if (@passwords) {
foreach my $pass (@passwords) {
$pass=~s/\s//g;
chomp($pass);
# Looking for User with user/ uppercase /capitalise weak password
@mysqlstatlist = select_array "SELECT CONCAT(user, '\@', host) FROM mysql.user WHERE password = PASSWORD('".$pass."') OR password = PASSWORD(UPPER('".$pass."')) OR password = PASSWORD(UPPER(LEFT('".$pass."', 1)) + SUBSTRING('".$pass."', 2, LENGTH('".$pass."')))";
debugprint "There is ".scalar (@mysqlstatlist). " items.\n";
if (@mysqlstatlist) {
foreach my $line (@mysqlstatlist) {
chomp($line);
badprint "User '".$line."' is using weak pasword: $pass in a lower, upper or capitalize derivated version.\n";
$nbins++;
}
}
}
}
if ($nbins>0) {
push(@generalrec, $nbins. " user(s) used basic or weaked password.");
}
}
sub get_replication_status {
prettyprint "\n-------- Replication Metrics -------------------------------------------------\n";
if( scalar(keys %myslaves)==0 ) {
infoprint "No replication slave(s) for this server.\n";
} else {
infoprint "This server is acting as master for ".scalar(keys %myslaves)." server(s).\n";
}
if( scalar(keys %myrepl)==0 and scalar(keys %myslaves)==0 ) {
infoprint "This is a standalone server..\n";
return;
}
if( scalar(keys %myrepl)==0 ) {
infoprint "No replication setup for this server.\n";
}
my ($io_running) = $myrepl{'Slave_IO_Running'};
debugprint "IO RUNNING: $io_running \n";
my ($sql_running) = $myrepl{'Slave_SQL_Running'};
debugprint "SQL RUNNING: $sql_running \n";
my ($seconds_behind_master) = $myrepl{'Seconds_Behind_Master'};
debugprint "SECONDS : $seconds_behind_master \n";
if (defined($io_running) and ($io_running !~ '/yes/i' or $sql_running !~ '/yes/i' )) {
badprint "This replication slave is not running but seems to be configurated.";
}
if (defined($io_running ) && $io_running =~ '/yes/i' && $sql_running =~ '/yes/i') {
if ($myvar{'read_only'} eq 'OFF') {
badprint "This replication slave is running with the read_only option disabled.";
} else {
goodprint "This replication slave is running with the read_only option enabled.";
}
if ($seconds_behind_master>0) {
badprint "This replication slave is lagging and slave has $seconds_behind_master second(s) behind master host.";
} else {
goodprint "This replication slave is uptodate with master.";
}
}
}
# Checks for supported or EOL'ed MySQL versions
my ($mysqlvermajor,$mysqlverminor, $mysqlvermicro);
sub validate_mysql_version {
($mysqlvermajor,$mysqlverminor,$mysqlvermicro) = $myvar{'version'} =~ /^(\d+)(?:\.(\d+)|)(?:\.(\d+)|)/;
$mysqlverminor ||= 0;
$mysqlvermicro ||= 0;
if (!mysql_version_ge(5, 1)) {
badprint "Your MySQL version ".$myvar{'version'}." is EOL software! Upgrade soon!\n";
} elsif (mysql_version_ge(6)) {
badprint "Currently running unsupported MySQL version ".$myvar{'version'}."\n";
} else {
goodprint "Currently running supported MySQL version ".$myvar{'version'}."\n";
}
}
# Checks if MySQL version is greater than equal to (major, minor, micro)
sub mysql_version_ge {
my ($maj, $min, $mic) = @_;
$min ||= 0;
$mic ||= 0;
return $mysqlvermajor > $maj || $mysqlvermajor == $maj && ($mysqlverminor > $min || $mysqlverminor == $min && $mysqlvermicro >= $mic);
}
# Checks for 32-bit boxes with more than 2GB of RAM
my ($arch);
sub check_architecture {
if ($doremote eq 1) { return; }
if (`uname` =~ /SunOS/ && `isainfo -b` =~ /64/) {
$arch = 64;
goodprint "Operating on 64-bit architecture\n";
} elsif (`uname` !~ /SunOS/ && `uname -m` =~ /64/) {
$arch = 64;
goodprint "Operating on 64-bit architecture\n";
} elsif (`uname` =~ /AIX/ && `bootinfo -K` =~ /64/) {
$arch = 64;
goodprint "Operating on 64-bit architecture\n";
} elsif (`uname` =~ /NetBSD|OpenBSD/ && `sysctl -b hw.machine` =~ /64/) {
$arch = 64;
goodprint "Operating on 64-bit architecture\n";
} elsif (`uname` =~ /FreeBSD/ && `sysctl -b hw.machine_arch` =~ /64/) {
$arch = 64;
goodprint "Operating on 64-bit architecture\n";
} elsif (`uname` =~ /Darwin/ && `uname -m` =~ /Power Macintosh/) {
# Darwin box.local 9.8.0 Darwin Kernel Version 9.8.0: Wed Jul 15 16:57:01 PDT 2009; root:xnu1228.15.4~1/RELEASE_PPC Power Macintosh
$arch = 64;
goodprint "Operating on 64-bit architecture\n";
} elsif (`uname` =~ /Darwin/ && `uname -m` =~ /x86_64/) {
# Darwin gibas.local 12.3.0 Darwin Kernel Version 12.3.0: Sun Jan 6 22:37:10 PST 2013; root:xnu-2050.22.13~1/RELEASE_X86_64 x86_64
$arch = 64;
goodprint "Operating on 64-bit architecture\n";
} else {
$arch = 32;
if ($physical_memory > 2147483648) {
badprint "Switch to 64-bit OS - MySQL cannot currently use all of your RAM\n";
} else {
goodprint "Operating on 32-bit architecture with less than 2GB RAM\n";
}
}
$result{'OS'}{'Architecture'}="$arch bits";
}
# Start up a ton of storage engine counts/statistics
my (%enginestats,%enginecount,$fragtables);
sub check_storage_engines {
if ($opt{skipsize} eq 1) {
prettyprint "\n-------- Storage Engine Statistics -------------------------------------------\n";
infoprint "Skipped due to --skipsize option\n";
return;
}
prettyprint "\n-------- Storage Engine Statistics -------------------------------------------\n";
my $engines;
if (mysql_version_ge(5, 1, 5)) {
my @engineresults = select_array "SELECT ENGINE,SUPPORT FROM information_schema.ENGINES WHERE ENGINE NOT IN ('performance_schema','MyISAM','MERGE','MEMORY') ORDER BY ENGINE ASC";
foreach my $line (@engineresults) {
my ($engine,$engineenabled);
($engine,$engineenabled) = $line =~ /([a-zA-Z_]*)\s+([a-zA-Z]+)/;
$result{'Engine'}{$engine}{'Enabled'}=$engineenabled;
$engines .= ($engineenabled eq "YES" || $engineenabled eq "DEFAULT") ? greenwrap "+".$engine." " : redwrap "-".$engine." ";
}
} else {
$engines .= (defined $myvar{'have_archive'} && $myvar{'have_archive'} eq "YES")? greenwrap "+Archive " : redwrap "-Archive " ;
$engines .= (defined $myvar{'have_bdb'} && $myvar{'have_bdb'} eq "YES")? greenwrap "+BDB " : redwrap "-BDB " ;
$engines .= (defined $myvar{'have_federated_engine'} && $myvar{'have_federated_engine'} eq "YES")? greenwrap "+Federated " : redwrap "-Federated " ;
$engines .= (defined $myvar{'have_innodb'} && $myvar{'have_innodb'} eq "YES")? greenwrap "+InnoDB " : redwrap "-InnoDB " ;
$engines .= (defined $myvar{'have_isam'} && $myvar{'have_isam'} eq "YES")? greenwrap "+ISAM " : redwrap "-ISAM " ;
$engines .= (defined $myvar{'have_ndbcluster'} && $myvar{'have_ndbcluster'} eq "YES")? greenwrap "+NDBCluster " : redwrap "-NDBCluster " ;
}
my @dblist = select_array "SHOW DATABASES";
$result{'Databases'}{'List'}=[@dblist];
infoprint "Status: $engines\n";
if (mysql_version_ge(5, 1, 5)) {
# MySQL 5 servers can have table sizes calculated quickly from information schema
my @templist = select_array "SELECT ENGINE,SUM(DATA_LENGTH+INDEX_LENGTH),COUNT(ENGINE),SUM(DATA_LENGTH),SUM(INDEX_LENGTH) FROM information_schema.TABLES WHERE TABLE_SCHEMA NOT IN ('information_schema', 'performance_schema', 'mysql') AND ENGINE IS NOT NULL GROUP BY ENGINE ORDER BY ENGINE ASC;";
my ($engine,$size,$count,$dsize, $isize);
foreach my $line (@templist) {
($engine,$size,$count,$dsize, $isize) = $line =~ /([a-zA-Z_]*)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)/;
if (!defined($size)) { next; }
$enginestats{$engine} = $size;
$enginecount{$engine} = $count;
$result{'Engine'}{$engine}{'Table Number'}=$count;
$result{'Engine'}{$engine}{'Total Size'}=$size;
$result{'Engine'}{$engine}{'Data Size'}=$dsize;
$result{'Engine'}{$engine}{'Index Size'}=$isize;
}
$fragtables = select_one "SELECT COUNT(TABLE_NAME) FROM information_schema.TABLES WHERE TABLE_SCHEMA NOT IN ('information_schema','performance_schema', 'mysql') AND Data_free > 0 AND NOT ENGINE='MEMORY'";
chomp($fragtables);
$result{'Tables'}{'Fragmented tables'}= [ select_array "SELECT CONCAT(CONCAT(TABLE_SCHEMA, '.'), TABLE_NAME) FROM information_schema.TABLES WHERE TABLE_SCHEMA NOT IN ('information_schema','performance_schema', 'mysql') AND Data_free > 0 AND NOT ENGINE='MEMORY'" ];
} else {
# MySQL < 5 servers take a lot of work to get table sizes
my @tblist;
# Now we build a database list, and loop through it to get storage engine stats for tables
foreach my $db (@dblist) {
chomp($db);
if ($db eq "information_schema" or $db eq "performance_schema" or $db eq "mysql") { next; }
my @ixs = (1, 6, 9);
if (!mysql_version_ge(4, 1)) {
# MySQL 3.23/4.0 keeps Data_Length in the 5th (0-based) column
@ixs = (1, 5, 8);
}
push(@tblist, map { [ (split)[@ixs] ] } select_array "SHOW TABLE STATUS FROM \\\`$db\\\`");
}
# Parse through the table list to generate storage engine counts/statistics
$fragtables = 0;
foreach my $tbl (@tblist) {
my ($engine, $size, $datafree) = @$tbl;
if (defined $enginestats{$engine}) {
$enginestats{$engine} += $size;
$enginecount{$engine} += 1;
} else {
$enginestats{$engine} = $size;
$enginecount{$engine} = 1;
}
if ($datafree > 0) {
$fragtables++;
}
}
}
while (my ($engine,$size) = each(%enginestats)) {
infoprint "Data in $engine tables: ".hr_bytes_rnd($size)." (Tables: ".$enginecount{$engine}.")"."\n";
}
# If the storage engine isn't being used, recommend it to be disabled
if (!defined $enginestats{'InnoDB'} && defined $myvar{'have_innodb'} && $myvar{'have_innodb'} eq "YES") {
badprint "InnoDB is enabled but isn't being used\n";
push(@generalrec,"Add skip-innodb to MySQL configuration to disable InnoDB");
}
if (!defined $enginestats{'BerkeleyDB'} && defined $myvar{'have_bdb'} && $myvar{'have_bdb'} eq "YES") {
badprint "BDB is enabled but isn't being used\n";
push(@generalrec,"Add skip-bdb to MySQL configuration to disable BDB");
}
if (!defined $enginestats{'ISAM'} && defined $myvar{'have_isam'} && $myvar{'have_isam'} eq "YES") {
badprint "MYISAM is enabled but isn't being used\n";
push(@generalrec,"Add skip-isam to MySQL configuration to disable ISAM (MySQL > 4.1.0)");
}
# Fragmented tables
if ($fragtables > 0) {
badprint "Total fragmented tables: $fragtables\n";
push(@generalrec,"Run OPTIMIZE TABLE to defragment tables for better performance");
} else {
goodprint "Total fragmented tables: $fragtables\n";
}
# Auto increments
my %tblist;
# Find the maximum integer
my $maxint = select_one "SELECT ~0";
$result{'MaxInt'}=$maxint;
# Now we use a database list, and loop through it to get storage engine stats for tables
foreach my $db (@dblist) {
chomp($db);
if(!$tblist{$db})
{
$tblist{$db} = ();
}
if ($db eq "information_schema") { next; }
my @ia = (0, 10);
if (!mysql_version_ge(4, 1)) {
# MySQL 3.23/4.0 keeps Data_Length in the 5th (0-based) column
@ia = (0, 9);
}
push(@{$tblist{$db}}, map { [ (split)[@ia] ] } select_array "SHOW TABLE STATUS FROM \\\`$db\\\`");
}
my @dbnames = keys %tblist;
foreach my $db (@dbnames) {
foreach my $tbl (@{$tblist{$db}}) {
my ($name, $autoincrement) = @$tbl;
if ($autoincrement =~ /^\d+?$/) {
my $percent = percentage($autoincrement, $maxint);
$result{'PctAutoIncrement'}{"$db.$name"}=$percent;
if($percent >= 75) {
badprint "Table '$db.$name' has an autoincrement value near max capacity ($percent%)\n";
}
}
}
}
}
my %mycalc;
sub calculations {
if ($mystat{'Questions'} < 1) {
badprint "Your server has not answered any queries - cannot continue...";
exit 0;
}
# Per-thread memory
if (mysql_version_ge(4)) {
$mycalc{'per_thread_buffers'} = $myvar{'read_buffer_size'} + $myvar{'read_rnd_buffer_size'} + $myvar{'sort_buffer_size'} + $myvar{'thread_stack'} + $myvar{'join_buffer_size'};
} else {
$mycalc{'per_thread_buffers'} = $myvar{'record_buffer'} + $myvar{'record_rnd_buffer'} + $myvar{'sort_buffer'} + $myvar{'thread_stack'} + $myvar{'join_buffer_size'};
}
$mycalc{'total_per_thread_buffers'} = $mycalc{'per_thread_buffers'} * $myvar{'max_connections'};
$mycalc{'max_total_per_thread_buffers'} = $mycalc{'per_thread_buffers'} * $mystat{'Max_used_connections'};
# Server-wide memory
$mycalc{'max_tmp_table_size'} = ($myvar{'tmp_table_size'} > $myvar{'max_heap_table_size'}) ? $myvar{'max_heap_table_size'} : $myvar{'tmp_table_size'} ;
$mycalc{'server_buffers'} = $myvar{'key_buffer_size'} + $mycalc{'max_tmp_table_size'};
$mycalc{'server_buffers'} += (defined $myvar{'innodb_buffer_pool_size'}) ? $myvar{'innodb_buffer_pool_size'} : 0 ;
$mycalc{'server_buffers'} += (defined $myvar{'innodb_additional_mem_pool_size'}) ? $myvar{'innodb_additional_mem_pool_size'} : 0 ;
$mycalc{'server_buffers'} += (defined $myvar{'innodb_log_buffer_size'}) ? $myvar{'innodb_log_buffer_size'} : 0 ;
$mycalc{'server_buffers'} += (defined $myvar{'query_cache_size'}) ? $myvar{'query_cache_size'} : 0 ;
# Global memory
# Max used memory is memory used by MySQL based on Max_used_connections
# This is the max memory used theorically calculated with the max concurrent connection number reached by mysql
$mycalc{'max_used_memory'} = $mycalc{'server_buffers'} + $mycalc{"max_total_per_thread_buffers"};
$mycalc{'pct_max_used_memory'} = percentage($mycalc{'max_used_memory'}, $physical_memory);
# Total possible memory is memory needed by MySQL based on max_connections
# This is the max memory MySQL can theorically used if all connections allowed has opened by mysql
$mycalc{'max_peak_memory'} = $mycalc{'server_buffers'} + $mycalc{'total_per_thread_buffers'};
$mycalc{'pct_max_physical_memory'} = percentage($mycalc{'max_peak_memory'}, $physical_memory);
debugprint "Max Used Memory: ".hr_bytes($mycalc{'max_used_memory'})."\n";
debugprint "Max Used Percentage RAM: ".$mycalc{'pct_max_used_memory'}."%\n";
debugprint "Max Peak Memory: ".hr_bytes($mycalc{'max_peak_memory'})."\n";
debugprint "Max Peak Percentage RAM: ".$mycalc{'pct_max_physical_memory'}."%\n";
# Slow queries
$mycalc{'pct_slow_queries'} = int(($mystat{'Slow_queries'}/$mystat{'Questions'}) * 100);
# Connections
$mycalc{'pct_connections_used'} = int(($mystat{'Max_used_connections'}/$myvar{'max_connections'}) * 100);
$mycalc{'pct_connections_used'} = ($mycalc{'pct_connections_used'} > 100) ? 100 : $mycalc{'pct_connections_used'} ;
# Aborted Connections
$mycalc{'pct_connections_aborted'} = percentage($mystat{'Aborted_connects'}, $mystat{'Connections'});
debugprint "Aborted_connects: ".$mystat{'Aborted_connects'}."\n";
debugprint "Connections: ".$mystat{'Connections'}."\n";
debugprint "pct_connections_aborted: ".$mycalc{'pct_connections_aborted'}."\n";
# Key buffers
if (mysql_version_ge(4, 1) && $myvar{'key_buffer_size'} > 0) {
$mycalc{'pct_key_buffer_used'} = sprintf("%.1f",(1 - (($mystat{'Key_blocks_unused'} * $myvar{'key_cache_block_size'}) / $myvar{'key_buffer_size'})) * 100);
} else {
$mycalc{'pct_key_buffer_used'} = 0;
}
if ($mystat{'Key_read_requests'} > 0) {
$mycalc{'pct_keys_from_mem'} = sprintf("%.1f",(100 - (($mystat{'Key_reads'} / $mystat{'Key_read_requests'}) * 100)));
} else {
$mycalc{'pct_keys_from_mem'} = 0;
}
if ($mystat{'Key_write_requests'} > 0) {
$mycalc{'pct_wkeys_from_mem'} = sprintf("%.1f",(100 - (($mystat{'Key_writes'} / $mystat{'Key_write_requests'}) * 100)));
} else {
$mycalc{'pct_wkeys_from_mem'} = 0;
}
if ($doremote eq 0 and !mysql_version_ge(5)) {
my $size = 0;
$size += (split)[0] for `find $myvar{'datadir'} -name "*.MYI" 2>&1 | xargs du -L $duflags 2>&1`;
$mycalc{'total_myisam_indexes'} = $size;
} elsif (mysql_version_ge(5)) {
$mycalc{'total_myisam_indexes'} = select_one "SELECT IFNULL(SUM(INDEX_LENGTH),0) FROM information_schema.TABLES WHERE TABLE_SCHEMA NOT IN ('information_schema') AND ENGINE = 'MyISAM';";
}
if (defined $mycalc{'total_myisam_indexes'} and $mycalc{'total_myisam_indexes'} == 0) {
$mycalc{'total_myisam_indexes'} = "fail";
} elsif (defined $mycalc{'total_myisam_indexes'}) {
chomp($mycalc{'total_myisam_indexes'});
}
# Query cache
if (mysql_version_ge(4)) {
$mycalc{'query_cache_efficiency'} = sprintf("%.1f",($mystat{'Qcache_hits'} / ($mystat{'Com_select'} + $mystat{'Qcache_hits'})) * 100);
if ($myvar{'query_cache_size'}) {
$mycalc{'pct_query_cache_used'} = sprintf("%.1f",100 - ($mystat{'Qcache_free_memory'} / $myvar{'query_cache_size'}) * 100);
}
if ($mystat{'Qcache_lowmem_prunes'} == 0) {
$mycalc{'query_cache_prunes_per_day'} = 0;
} else {
$mycalc{'query_cache_prunes_per_day'} = int($mystat{'Qcache_lowmem_prunes'} / ($mystat{'Uptime'}/86400));
}
}
# Sorting
$mycalc{'total_sorts'} = $mystat{'Sort_scan'} + $mystat{'Sort_range'};
if ($mycalc{'total_sorts'} > 0) {
$mycalc{'pct_temp_sort_table'} = int(($mystat{'Sort_merge_passes'} / $mycalc{'total_sorts'}) * 100);
}
# Joins
$mycalc{'joins_without_indexes'} = $mystat{'Select_range_check'} + $mystat{'Select_full_join'};
$mycalc{'joins_without_indexes_per_day'} = int($mycalc{'joins_without_indexes'} / ($mystat{'Uptime'}/86400));
# Temporary tables
if ($mystat{'Created_tmp_tables'} > 0) {
if ($mystat{'Created_tmp_disk_tables'} > 0) {
$mycalc{'pct_temp_disk'} = int(($mystat{'Created_tmp_disk_tables'} / $mystat{'Created_tmp_tables'}) * 100);
} else {
$mycalc{'pct_temp_disk'} = 0;
}
}
# Table cache
if ($mystat{'Opened_tables'} > 0) {
$mycalc{'table_cache_hit_rate'} = int($mystat{'Open_tables'}*100/$mystat{'Opened_tables'});
} else {
$mycalc{'table_cache_hit_rate'} = 100;
}
# Open files
if ($myvar{'open_files_limit'} > 0) {
$mycalc{'pct_files_open'} = int($mystat{'Open_files'}*100/$myvar{'open_files_limit'});
}
# Table locks
if ($mystat{'Table_locks_immediate'} > 0) {
if ($mystat{'Table_locks_waited'} == 0) {
$mycalc{'pct_table_locks_immediate'} = 100;
} else {
$mycalc{'pct_table_locks_immediate'} = int($mystat{'Table_locks_immediate'}*100/($mystat{'Table_locks_waited'} + $mystat{'Table_locks_immediate'}));
}
}
# Thread cache
$mycalc{'thread_cache_hit_rate'} = int(100 - (($mystat{'Threads_created'} / $mystat{'Connections'}) * 100));
# Other
if ($mystat{'Connections'} > 0) {
$mycalc{'pct_aborted_connections'} = int(($mystat{'Aborted_connects'}/$mystat{'Connections'}) * 100);
}
if ($mystat{'Questions'} > 0) {
$mycalc{'total_reads'} = $mystat{'Com_select'};
$mycalc{'total_writes'} = $mystat{'Com_delete'} + $mystat{'Com_insert'} + $mystat{'Com_update'} + $mystat{'Com_replace'};
if ($mycalc{'total_reads'} == 0) {
$mycalc{'pct_reads'} = 0;
$mycalc{'pct_writes'} = 100;
} else {
$mycalc{'pct_reads'} = int(($mycalc{'total_reads'}/($mycalc{'total_reads'}+$mycalc{'total_writes'})) * 100);
$mycalc{'pct_writes'} = 100-$mycalc{'pct_reads'};
}
}
# InnoDB
if ($myvar{'have_innodb'} eq "YES") {
$mycalc{'innodb_log_size_pct'} = ($myvar{'innodb_log_file_size'} * 100 / $myvar{'innodb_buffer_pool_size'});
}
($mystat{'Innodb_buffer_pool_read_requests'}, $mystat{'Innodb_buffer_pool_reads'})=(1,1) unless defined $mystat{'Innodb_buffer_pool_reads'};
$mycalc{'pct_read_efficiency'}=percentage(($mystat{'Innodb_buffer_pool_read_requests'}-$mystat{'Innodb_buffer_pool_reads'}), $mystat{'Innodb_buffer_pool_read_requests'}) if defined $mystat{'Innodb_buffer_pool_read_requests'};
debugprint "pct_read_efficiency: ".$mycalc{'pct_read_efficiency'}."\n";
debugprint "Innodb_buffer_pool_reads: ".$mystat{'Innodb_buffer_pool_reads'}."\n";
debugprint "Innodb_buffer_pool_read_requests: ".$mystat{'Innodb_buffer_pool_read_requests'}."\n";
($mystat{'Innodb_buffer_pool_write_requests'}, $mystat{'Innodb_buffer_pool_writes'})=(1,1) unless defined $mystat{'Innodb_buffer_pool_writes'};
$mycalc{'pct_write_efficiency'}=percentage(($mystat{'Innodb_buffer_pool_write_requests'}-$mystat{'Innodb_buffer_pool_writes'}), $mystat{'Innodb_buffer_pool_write_requests'}) if defined $mystat{'Innodb_buffer_pool_write_requests'};
debugprint "pct_write_efficiency: ".$mycalc{'pct_read_efficiency'}."\n";
debugprint "Innodb_buffer_pool_writes: ".$mystat{'Innodb_buffer_pool_writes'}."\n";
debugprint "Innodb_buffer_pool_write_requests: ".$mystat{'Innodb_buffer_pool_write_requests'}."\n";
$mycalc{'pct_innodb_buffer_used'}=percentage(($mystat{'Innodb_buffer_pool_pages_total'}-$mystat{'Innodb_buffer_pool_pages_free'}), $mystat{'Innodb_buffer_pool_pages_total'}) if defined $mystat{'Innodb_buffer_pool_pages_total'};
# Binlog Cache
if ($myvar{'log_bin'} ne 'OFF') {
$mycalc{'pct_binlog_cache'} = percentage( $mystat{'Binlog_cache_use'} - $mystat{'Binlog_cache_disk_use'}, $mystat{'Binlog_cache_use'} );
}
}
sub mysql_stats {
prettyprint "\n-------- Performance Metrics -------------------------------------------------\n";
# Show uptime, queries per second, connections, traffic stats
my $qps;
if ($mystat{'Uptime'} > 0) { $qps = sprintf("%.3f",$mystat{'Questions'}/$mystat{'Uptime'}); }
if ($mystat{'Uptime'} < 86400) { push(@generalrec,"MySQL started within last 24 hours - recommendations may be inaccurate"); }
infoprint "Up for: ".pretty_uptime($mystat{'Uptime'})." (".hr_num($mystat{'Questions'}).
" q [".hr_num($qps)." qps], ".hr_num($mystat{'Connections'})." conn,".
" TX: ".hr_num($mystat{'Bytes_sent'}).", RX: ".hr_num($mystat{'Bytes_received'}).")\n";
infoprint "Reads / Writes: ".$mycalc{'pct_reads'}."% / ".$mycalc{'pct_writes'}."%\n";
# Binlog Cache
if ($myvar{'log_bin'} eq 'OFF') {
infoprint "Binary logging is disabled\n";
} else {
infoprint "Binary logging is enabled (GTID MODE: ".(defined ($myvar{'gtid_mode'})?$myvar{'gtid_mode'}:"OFF").")\n";
}
# Memory usage
infoprint "Total buffers: ".hr_bytes($mycalc{'server_buffers'})." global + ".hr_bytes($mycalc{'per_thread_buffers'})." per thread ($myvar{'max_connections'} max threads)\n";
if ($opt{buffers} ne 0) {
infoprint "Global Buffers\n";
infoprint " +-- Key Buffer: " . hr_bytes($myvar{'key_buffer_size'}) . "\n";
infoprint " +-- Max Tmp Table: ".hr_bytes($mycalc{'max_tmp_table_size'})."\n";
if (defined $myvar{'query_cache_type'}) {
infoprint "Query Cache Buffers\n";
infoprint " +-- Query Cache: ".$myvar{'query_cache_type'}." - " .($myvar{'query_cache_type'} eq 0| $myvar{'query_cache_type'} eq 'OFF'?"DISABLED":($myvar{'query_cache_type'} eq 1?"ALL REQUESTS":"ON DEMAND")) . "\n";
infoprint " +-- Query Cache Size: " . hr_bytes($myvar{'query_cache_size'}) . "\n";
}
infoprint "Per Thread Buffers\n";
infoprint " +-- Read Buffer: " . hr_bytes($myvar{'read_buffer_size'}) . "\n";
infoprint " +-- Read RND Buffer: " . hr_bytes($myvar{'read_rnd_buffer_size'}) . "\n";
infoprint " +-- Sort Buffer: " . hr_bytes($myvar{'sort_buffer_size'}) . "\n";
infoprint " +-- Thread stack: " . hr_bytes($myvar{'thread_stack'}) . "\n";
infoprint " +-- Join Buffer: " . hr_bytes($myvar{'join_buffer_size'}) . "\n";
if ( $myvar{'log_bin'} ne 'OFF') {
infoprint "Binlog Cache Buffers\n";
infoprint " +-- Binlog Cache: ". hr_bytes($myvar{'binlog_cache_size'})."\n";
}
}
if ($arch && $arch == 32 && $mycalc{'total_possible_used_memory'} > 2*1024*1024*1024) {
badprint "Allocating > 2GB RAM on 32-bit systems can cause system instability\n";
badprint "Maximum reached memory usage: ".hr_bytes($mycalc{'max_used_memory'})." ($mycalc{'pct_max_used_memory'}% of installed RAM)\n";
} elsif ($mycalc{'pct_max_used_memory'} > 85) {
badprint "Maximum reached memory usage: ".hr_bytes($mycalc{'max_used_memory'})." ($mycalc{'pct_max_used_memory'}% of installed RAM)\n";
} else {
goodprint "Maximum reached memory usage: ".hr_bytes($mycalc{'max_used_memory'})." ($mycalc{'pct_max_used_memory'}% of installed RAM)\n";
}
if ($mycalc{'pct_max_physical_memory'} > 85) {
badprint "Maximum possible memory usage: ".hr_bytes($mycalc{'max_peak_memory'})." ($mycalc{'pct_max_physical_memory'}% of installed RAM)\n";
push(@generalrec,"Reduce your overall MySQL memory footprint for system stability");
} else {
goodprint "Maximum possible memory usage: ".hr_bytes($mycalc{'max_peak_memory'})." ($mycalc{'pct_max_physical_memory'}% of installed RAM)\n";
}
# Slow queries
if ($mycalc{'pct_slow_queries'} > 5) {
badprint "Slow queries: $mycalc{'pct_slow_queries'}% (".hr_num($mystat{'Slow_queries'})."/".hr_num($mystat{'Questions'}).")\n";
} else {
goodprint "Slow queries: $mycalc{'pct_slow_queries'}% (".hr_num($mystat{'Slow_queries'})."/".hr_num($mystat{'Questions'}).")\n";
}
if ($myvar{'long_query_time'} > 10) { push(@adjvars,"long_query_time (<= 10)"); }
if (defined($myvar{'log_slow_queries'})) {
if ($myvar{'log_slow_queries'} eq "OFF") { push(@generalrec,"Enable the slow query log to troubleshoot bad queries"); }
}
# Connections
if ($mycalc{'pct_connections_used'} > 85) {
badprint "Highest connection usage: $mycalc{'pct_connections_used'}% ($mystat{'Max_used_connections'}/$myvar{'max_connections'})\n";
push(@adjvars,"max_connections (> ".$myvar{'max_connections'}.")");
push(@adjvars,"wait_timeout (< ".$myvar{'wait_timeout'}.")","interactive_timeout (< ".$myvar{'interactive_timeout'}.")");
push(@generalrec,"Reduce or eliminate persistent connections to reduce connection usage")
} else {
goodprint "Highest usage of available connections: $mycalc{'pct_connections_used'}% ($mystat{'Max_used_connections'}/$myvar{'max_connections'})\n";
}
# Aborted Connections
if ($mycalc{'pct_connections_aborted'} > 3) {
badprint "Aborted connections: $mycalc{'pct_connections_aborted'}% ($mystat{'Aborted_connects'}/$mystat{'Connections'})\n";
push(@generalrec,"Reduce or eliminate unclosed connections and network issues")
} else {
goodprint "Aborted connections: $mycalc{'pct_connections_aborted'}% ($mystat{'Aborted_connects'}/$mystat{'Connections'})\n";
}
# Key buffer usage
if (defined($mycalc{'pct_key_buffer_used'})) {
if ($mycalc{'pct_key_buffer_used'} < 90) {
badprint "Key buffer used: $mycalc{'pct_key_buffer_used'}% (".hr_num( $myvar{'key_buffer_size'} * $mycalc{'pct_key_buffer_used'} / 100)." used / ".hr_num($myvar{'key_buffer_size'})." cache)\n";
#push(@adjvars,"key_buffer_size (\~ ".hr_num( $myvar{'key_buffer_size'} * $mycalc{'pct_key_buffer_used'} / 100).")");
} else {
goodprint "Key buffer used: $mycalc{'pct_key_buffer_used'}% (".hr_num( $myvar{'key_buffer_size'} * $mycalc{'pct_key_buffer_used'} / 100)." used / ".hr_num($myvar{'key_buffer_size'})." cache)\n";
}
} else {
# No queries have run that would use keys
debugprint "Key buffer used: $mycalc{'pct_key_buffer_used'}% (".hr_num( $myvar{'key_buffer_size'} * $mycalc{'pct_key_buffer_used'} / 100)." used / ".hr_num($myvar{'key_buffer_size'})." cache)\n";
}
# Key buffer
if (!defined($mycalc{'total_myisam_indexes'}) and $doremote == 1) {
push(@generalrec,"Unable to calculate MyISAM indexes on remote MySQL server < 5.0.0");
} elsif ($mycalc{'total_myisam_indexes'} =~ /^fail$/) {
badprint "Cannot calculate MyISAM index size - re-run script as root user\n";
} elsif ($mycalc{'total_myisam_indexes'} == "0") {
badprint "None of your MyISAM tables are indexed - add indexes immediately\n";
} else {
if ($myvar{'key_buffer_size'} < $mycalc{'total_myisam_indexes'} && $mycalc{'pct_keys_from_mem'} < 95) {
badprint "Key buffer size / total MyISAM indexes: ".hr_bytes($myvar{'key_buffer_size'})."/".hr_bytes($mycalc{'total_myisam_indexes'})."\n";
push(@adjvars,"key_buffer_size (> ".hr_bytes($mycalc{'total_myisam_indexes'}).")");
} else {
goodprint "Key buffer size / total MyISAM indexes: ".hr_bytes($myvar{'key_buffer_size'})."/".hr_bytes($mycalc{'total_myisam_indexes'})."\n";
}
if ($mystat{'Key_read_requests'} > 0) {
if ($mycalc{'pct_keys_from_mem'} < 95) {
badprint "Read Key buffer hit rate: $mycalc{'pct_keys_from_mem'}% (".hr_num($mystat{'Key_read_requests'})." cached / ".hr_num($mystat{'Key_reads'})." reads)\n";
} else {
goodprint "Read Key buffer hit rate: $mycalc{'pct_keys_from_mem'}% (".hr_num($mystat{'Key_read_requests'})." cached / ".hr_num($mystat{'Key_reads'})." reads)\n";
}
} else {
# No queries have run that would use keys
debugprint "Key buffer size / total MyISAM indexes: ".hr_bytes($myvar{'key_buffer_size'})."/".hr_bytes($mycalc{'total_myisam_indexes'})."\n";
}
if ($mystat{'Key_write_requests'} > 0) {
if ($mycalc{'pct_wkeys_from_mem'} < 95) {
badprint "Write Key buffer hit rate: $mycalc{'pct_wkeys_from_mem'}% (".hr_num($mystat{'Key_write_requests'})." cached / ".hr_num($mystat{'Key_writes'})." writes)\n";
} else {
goodprint "Write Key buffer hit rate: $mycalc{'pct_wkeys_from_mem'}% (".hr_num($mystat{'Key_write_requests'})." cached / ".hr_num($mystat{'Key_writes'})." writes)\n";
}
} else {
# No queries have run that would use keys
debugprint "Write Key buffer hit rate: $mycalc{'pct_wkeys_from_mem'}% (".hr_num($mystat{'Key_write_requests'})." cached / ".hr_num($mystat{'Key_writes'})." writes)\n";
}
}
# Query cache
if (!mysql_version_ge(4)) {
# MySQL versions < 4.01 don't support query caching
push(@generalrec,"Upgrade MySQL to version 4+ to utilize query caching");
} elsif ($myvar{'query_cache_size'} < 1) {
badprint "Query cache is disabled\n";
push(@adjvars,"query_cache_size (>= 8M)");
} elsif ($myvar{'query_cache_type'} eq "OFF") {
badprint "Query cache is disabled\n";
push(@adjvars,"query_cache_type (=1)");
} elsif ($mystat{'Com_select'} == 0) {
badprint "Query cache cannot be analyzed - no SELECT statements executed\n";
} else {
if ($mycalc{'query_cache_efficiency'} < 20) {
badprint "Query cache efficiency: $mycalc{'query_cache_efficiency'}% (".hr_num($mystat{'Qcache_hits'})." cached / ".hr_num($mystat{'Qcache_hits'}+$mystat{'Com_select'})." selects)\n";
push(@adjvars,"query_cache_limit (> ".hr_bytes_rnd($myvar{'query_cache_limit'}).", or use smaller result sets)");
} else {
goodprint "Query cache efficiency: $mycalc{'query_cache_efficiency'}% (".hr_num($mystat{'Qcache_hits'})." cached / ".hr_num($mystat{'Qcache_hits'}+$mystat{'Com_select'})." selects)\n";
}
if ($mycalc{'query_cache_prunes_per_day'} > 98) {
badprint "Query cache prunes per day: $mycalc{'query_cache_prunes_per_day'}\n";
if ($myvar{'query_cache_size'} >= 128*1024*1024) {
push(@generalrec,"Increasing the query_cache size over 128M may reduce performance");
push(@adjvars,"query_cache_size (> ".hr_bytes_rnd($myvar{'query_cache_size'}).") [see warning above]");
} else {
push(@adjvars,"query_cache_size (> ".hr_bytes_rnd($myvar{'query_cache_size'}).")");
}
} else {
goodprint "Query cache prunes per day: $mycalc{'query_cache_prunes_per_day'}\n";
}
}
# Sorting
if ($mycalc{'total_sorts'} == 0) {
# For the sake of space, we will be quiet here
# No sorts have run yet
} elsif ($mycalc{'pct_temp_sort_table'} > 10) {
badprint "Sorts requiring temporary tables: $mycalc{'pct_temp_sort_table'}% (".hr_num($mystat{'Sort_merge_passes'})." temp sorts / ".hr_num($mycalc{'total_sorts'})." sorts)\n";
push(@adjvars,"sort_buffer_size (> ".hr_bytes_rnd($myvar{'sort_buffer_size'}).")");
push(@adjvars,"read_rnd_buffer_size (> ".hr_bytes_rnd($myvar{'read_rnd_buffer_size'}).")");
} else {
goodprint "Sorts requiring temporary tables: $mycalc{'pct_temp_sort_table'}% (".hr_num($mystat{'Sort_merge_passes'})." temp sorts / ".hr_num($mycalc{'total_sorts'})." sorts)\n";
}
# Joins
if ($mycalc{'joins_without_indexes_per_day'} > 250) {
badprint "Joins performed without indexes: $mycalc{'joins_without_indexes'}\n";
push(@adjvars,"join_buffer_size (> ".hr_bytes($myvar{'join_buffer_size'}).", or always use indexes with joins)");
push(@generalrec,"Adjust your join queries to always utilize indexes");
} else {
# For the sake of space, we will be quiet here
# No joins have run without indexes
}
# Temporary tables
if ($mystat{'Created_tmp_tables'} > 0) {
if ($mycalc{'pct_temp_disk'} > 25 && $mycalc{'max_tmp_table_size'} < 256*1024*1024) {
badprint "Temporary tables created on disk: $mycalc{'pct_temp_disk'}% (".hr_num($mystat{'Created_tmp_disk_tables'})." on disk / ".hr_num($mystat{'Created_tmp_tables'})." total)\n";
push(@adjvars,"tmp_table_size (> ".hr_bytes_rnd($myvar{'tmp_table_size'}).")");
push(@adjvars,"max_heap_table_size (> ".hr_bytes_rnd($myvar{'max_heap_table_size'}).")");
push(@generalrec,"When making adjustments, make tmp_table_size/max_heap_table_size equal");
push(@generalrec,"Reduce your SELECT DISTINCT queries without LIMIT clauses");
} elsif ($mycalc{'pct_temp_disk'} > 25 && $mycalc{'max_tmp_table_size'} >= 256*1024*1024) {
badprint "Temporary tables created on disk: $mycalc{'pct_temp_disk'}% (".hr_num($mystat{'Created_tmp_disk_tables'})." on disk / ".hr_num($mystat{'Created_tmp_tables'})." total)\n";
push(@generalrec,"Temporary table size is already large - reduce result set size");
push(@generalrec,"Reduce your SELECT DISTINCT queries without LIMIT clauses");
} else {
goodprint "Temporary tables created on disk: $mycalc{'pct_temp_disk'}% (".hr_num($mystat{'Created_tmp_disk_tables'})." on disk / ".hr_num($mystat{'Created_tmp_tables'})." total)\n";
}
} else {
# For the sake of space, we will be quiet here
# No temporary tables have been created
}
# Thread cache
if ($myvar{'thread_cache_size'} eq 0) {
badprint "Thread cache is disabled\n";
push(@generalrec,"Set thread_cache_size to 4 as a starting value");
push(@adjvars,"thread_cache_size (start at 4)");
} else {
if ($mycalc{'thread_cache_hit_rate'} <= 50) {
badprint "Thread cache hit rate: $mycalc{'thread_cache_hit_rate'}% (".hr_num($mystat{'Threads_created'})." created / ".hr_num($mystat{'Connections'})." connections)\n";
push(@adjvars,"thread_cache_size (> $myvar{'thread_cache_size'})");
} else {
goodprint "Thread cache hit rate: $mycalc{'thread_cache_hit_rate'}% (".hr_num($mystat{'Threads_created'})." created / ".hr_num($mystat{'Connections'})." connections)\n";
}
}
# Table cache
my $table_cache_var = "";
if ($mystat{'Open_tables'} > 0) {
if ($mycalc{'table_cache_hit_rate'} < 20) {
badprint "Table cache hit rate: $mycalc{'table_cache_hit_rate'}% (".hr_num($mystat{'Open_tables'})." open / ".hr_num($mystat{'Opened_tables'})." opened)\n";
if (mysql_version_ge(5, 1)) {
$table_cache_var = "table_open_cache";
} else {
$table_cache_var = "table_cache";
}
push(@adjvars,$table_cache_var." (> ".$myvar{$table_cache_var}.")");
push(@generalrec,"Increase ".$table_cache_var." gradually to avoid file descriptor limits");
push(@generalrec,"Read this before increasing ".$table_cache_var." over 64: http://bit.ly/1mi7c4C");
} else {
goodprint "Table cache hit rate: $mycalc{'table_cache_hit_rate'}% (".hr_num($mystat{'Open_tables'})." open / ".hr_num($mystat{'Opened_tables'})." opened)\n";
}
}
# Open files
if (defined $mycalc{'pct_files_open'}) {
if ($mycalc{'pct_files_open'} > 85) {
badprint "Open file limit used: $mycalc{'pct_files_open'}% (".hr_num($mystat{'Open_files'})."/".hr_num($myvar{'open_files_limit'}).")\n";
push(@adjvars,"open_files_limit (> ".$myvar{'open_files_limit'}.")");
} else {
goodprint "Open file limit used: $mycalc{'pct_files_open'}% (".hr_num($mystat{'Open_files'})."/".hr_num($myvar{'open_files_limit'}).")\n";
}
}
# Table locks
if (defined $mycalc{'pct_table_locks_immediate'}) {
if ($mycalc{'pct_table_locks_immediate'} < 95) {
badprint "Table locks acquired immediately: $mycalc{'pct_table_locks_immediate'}%\n";
push(@generalrec,"Optimize queries and/or use InnoDB to reduce lock wait");
} else {
goodprint "Table locks acquired immediately: $mycalc{'pct_table_locks_immediate'}% (".hr_num($mystat{'Table_locks_immediate'})." immediate / ".hr_num($mystat{'Table_locks_waited'}+$mystat{'Table_locks_immediate'})." locks)\n";
}
}
# Binlog cache
if (defined $mycalc{'pct_binlog_cache'}) {
if ($mycalc{'pct_binlog_cache'} < 90 && $mystat{'Binlog_cache_use'}>0 ) {
badprint "Binlog cache memory access: ".$mycalc{'pct_binlog_cache'}."% ( ".($mystat{'Binlog_cache_use'}-$mystat{'Binlog_cache_disk_use'})." Memory / ".$mystat{'Binlog_cache_use'}." Total)\n";
push(@generalrec,"Increase binlog_cache_size (Actual value: ".$myvar{'binlog_cache_size'}.") ");
push(@adjvars,"binlog_cache_size (".hr_bytes($myvar{'binlog_cache_size'}+16*1024*1024)." ) ");
} else {
goodprint "Binlog cache memory access: ". $mycalc{'pct_binlog_cache'}."% ( ".($mystat{'Binlog_cache_use'}-$mystat{'Binlog_cache_disk_use'})." Memory / ".$mystat{'Binlog_cache_use'}." Total)\n";
debugprint "Not enought data to validate binlog cache size\n" if $mystat{'Binlog_cache_use'}<10;
}
}
# Performance options
if (!mysql_version_ge(5, 1)) {
push(@generalrec,"Upgrade to MySQL 5.5+ to use asynchrone write");
} elsif ($myvar{'concurrent_insert'} eq "OFF") {
push(@generalrec,"Enable concurrent_insert by setting it to 'ON'");
} elsif ($myvar{'concurrent_insert'} eq 0) {
push(@generalrec,"Enable concurrent_insert by setting it to 1");
}
if ($mycalc{'pct_aborted_connections'} > 5) {
badprint "Connections aborted: ".$mycalc{'pct_aborted_connections'}."%\n";
push(@generalrec,"Your applications are not closing MySQL connections properly");
}
}
# Recommandations for Innodb
sub mysql_innodb {
prettyprint "\n-------- InnoDB Metrics -----------------------------------------------------\n";
# InnoDB
unless (defined $myvar{'have_innodb'} && $myvar{'have_innodb'} eq "YES" && defined $enginestats{'InnoDB'}) {
infoprint "InnoDB is disabled.";
if (mysql_version_ge(5,5)) {
badprint "InnoDB Storage engine is disabled. InnoDB is the default storage engine\n";
}
return;
}
infoprint "InnoDB is enabled.\n";
if ($opt{buffers} ne 0) {
infoprint "InnoDB Buffers\n";
if (defined $myvar{'innodb_buffer_pool_size'}) {
infoprint " +-- InnoDB Buffer Pool: " . hr_bytes($myvar{'innodb_buffer_pool_size'}) . "\n";
}
if (defined $myvar{'innodb_buffer_pool_instances'}) {
infoprint " +-- InnoDB Buffer Pool Instances: " . $myvar{'innodb_buffer_pool_instances'} . "\n";
}
if (defined $myvar{'innodb_additional_mem_pool_size'}) {
infoprint " +-- InnoDB Additional Mem Pool: " . hr_bytes($myvar{'innodb_additional_mem_pool_size'}) . "\n";
}
if (defined $myvar{'innodb_log_buffer_size'}) {
infoprint " +-- InnoDB Log Buffer: " . hr_bytes($myvar{'innodb_log_buffer_size'}) . "\n";
}
if (defined $mystat{'Innodb_buffer_pool_pages_free'}) {
infoprint " +-- InnoDB Log Buffer Free: " . hr_bytes($mystat{'Innodb_buffer_pool_pages_free'}) . "\n";
}
if (defined $mystat{'Innodb_buffer_pool_pages_total'}) {
infoprint " +-- InnoDB Log Buffer Used: " . hr_bytes($mystat{'Innodb_buffer_pool_pages_total'}) . "\n";
}
}
# InnoDB Buffer Pull Size
if ($myvar{'innodb_buffer_pool_size'} > $enginestats{'InnoDB'}) {
goodprint "InnoDB buffer pool / data size: ".hr_bytes($myvar{'innodb_buffer_pool_size'})."/".hr_bytes($enginestats{'InnoDB'})."\n";
} else {
badprint "InnoDB buffer pool / data size: ".hr_bytes($myvar{'innodb_buffer_pool_size'})."/".hr_bytes($enginestats{'InnoDB'})."\n";
push(@adjvars,"innodb_buffer_pool_size (>= ".hr_bytes_rnd($enginestats{'InnoDB'}).") if possible.");
}
# InnoDB Buffer Pull Instances (MySQL 5.6.6+)
if (defined($myvar{'innodb_buffer_pool_instances'})) {
# Bad Value if > 64
if ($myvar{'innodb_buffer_pool_instances'} > 64) {
badprint "InnoDB buffer pool instances: ".$myvar{'innodb_buffer_pool_instances'}."\n";
push(@adjvars,"innodb_buffer_pool_instances (<= 64)");
}
# InnoDB Buffer Pull Size > 1Go
if ($myvar{'innodb_buffer_pool_size'} > 1024*1024*1024) {
# InnoDB Buffer Pull Size / 1Go = InnoDB Buffer Pull Instances
if ($myvar{'innodb_buffer_pool_instances'} != int($myvar{'innodb_buffer_pool_size'}/(1024*1024*1024))) {
badprint "InnoDB buffer pool instances: ".$myvar{'innodb_buffer_pool_instances'}."\n";
push(@adjvars,"innodb_buffer_pool_instances(=".int($myvar{'innodb_buffer_pool_size'}/(1024*1024*1024)).")");
} else {
goodprint "InnoDB buffer pool instances: ".$myvar{'innodb_buffer_pool_instances'}."\n";
}
# InnoDB Buffer Pull Size < 1Go
} else {
if ($myvar{'innodb_buffer_pool_instances'} != 1) {
badprint "InnoDB buffer pool <= 1G and innodb_buffer_pool_instances(!=1).\n";
push(@adjvars,"innodb_buffer_pool_instances (=1)");
} else {
goodprint "InnoDB buffer pool instances: ".$myvar{'innodb_buffer_pool_instances'}."\n";
}
}
}
# InnoDB Used Buffer Pool
if (defined $mycalc{'pct_innodb_buffer_used'} && $mycalc{'pct_innodb_buffer_used'} < 80 ) {
badprint "InnoDB Used buffer: ".$mycalc{'pct_innodb_buffer_used'}. "% (".($mystat{'Innodb_buffer_pool_pages_total'} - $mystat{'Innodb_buffer_pool_pages_free'})." used/ ".$mystat{'Innodb_buffer_pool_pages_total'}." total)\n";
} else {
goodprint "InnoDB Used buffer: ".$mycalc{'pct_innodb_buffer_used'}. "% (".($mystat{'Innodb_buffer_pool_pages_total'} - $mystat{'Innodb_buffer_pool_pages_free'})." used/ ".$mystat{'Innodb_buffer_pool_pages_total'}." total)\n";
}
# InnoDB Read efficency
if (defined $mycalc{'pct_read_efficiency'} && $mycalc{'pct_read_efficiency'} < 90 ) {
badprint "InnoDB Read buffer efficiency: ".$mycalc{'pct_read_efficiency'}. "% (".($mystat{'Innodb_buffer_pool_read_requests'} - $mystat{'Innodb_buffer_pool_reads'})." hits/ ".$mystat{'Innodb_buffer_pool_read_requests'}." total)\n";
} else {
goodprint "InnoDB Read buffer efficiency: ".$mycalc{'pct_read_efficiency'}. "% (".($mystat{'Innodb_buffer_pool_read_requests'} - $mystat{'Innodb_buffer_pool_reads'})." hits/ ".$mystat{'Innodb_buffer_pool_read_requests'}." total)\n";
}
# InnoDB Write efficency
if (defined $mycalc{'pct_write_efficiency'} && $mycalc{'pct_write_efficiency'} < 90 ) {
badprint "InnoDB Write buffer efficiency: ".$mycalc{'pct_write_efficiency'}. "% (".($mystat{'Innodb_buffer_pool_write_requests'} - $mystat{'Innodb_buffer_pool_writes'})." hits/ ".$mystat{'Innodb_buffer_pool_write_requests'}." total)\n";
} else {
goodprint "InnoDB Write buffer efficiency: ".$mycalc{'pct_write_efficiency'}. "% (".($mystat{'Innodb_buffer_pool_write_requests'} - $mystat{'Innodb_buffer_pool_writes'})." hits/ ".$mystat{'Innodb_buffer_pool_write_requests'}." total)\n";
}
# InnoDB Log Waits
if (defined $mystat{'Innodb_log_waits'} && $mystat{'Innodb_log_waits'} > 0) {
badprint "InnoDB log waits: ".percentage($mystat{'Innodb_log_waits'}, $mystat{'Innodb_log_writes'})."% (".$mystat{'Innodb_log_waits'}. " waits / ".$mystat{'Innodb_log_writes'}." writes)\n";
push(@adjvars,"innodb_log_buffer_size (>= ".hr_bytes_rnd($myvar{'innodb_log_buffer_size'}).")");
} else {
goodprint "InnoDB log waits: ".percentage($mystat{'Innodb_log_waits'}, $mystat{'Innodb_log_writes'})."% (".$mystat{'Innodb_log_waits'}. " waits / ".$mystat{'Innodb_log_writes'}." writes)\n";
}
$result{'Calculations'}={%mycalc};
}
# Recommandations for MySQL Databases
sub mysql_databases {
if ($opt{dbstat} == 0) {
return;
}
prettyprint "\n-------- Database Metrics ------------------------------------------------\n";
unless (mysql_version_ge(5,5)) {
infoprint "Skip Database metrics from information schema missing in this version\n";
return;
}
my @dblist=select_array("SHOW DATABASES;");
infoprint "There is ".scalar(@dblist). " Database(s).\n";
my @totaldbinfo=split /\s/, select_one("SELECT SUM(TABLE_ROWS), SUM(DATA_LENGTH), SUM(INDEX_LENGTH) , SUM(DATA_LENGTH+INDEX_LENGTH) FROM information_schema.TABLES;");
infoprint "All Databases:\n";
infoprint " +-- ROWS : ".($totaldbinfo[0] eq 'NULL'?0:$totaldbinfo[0])."\n";
infoprint " +-- DATA : ".hr_bytes($totaldbinfo[1])."(".percentage($totaldbinfo[1], $totaldbinfo[3])."%)\n";
infoprint " +-- INDEX: ".hr_bytes($totaldbinfo[2])."(".percentage($totaldbinfo[2], $totaldbinfo[3])."%)\n";
infoprint " +-- SIZE : ".hr_bytes($totaldbinfo[3])."\n";
badprint "Index size is larger than data size \n" if $totaldbinfo[1]<$totaldbinfo[2];
$result{'Databases'}{'All databases'}{'Rows'}=($totaldbinfo[0] eq 'NULL'?0:$totaldbinfo[0]);
$result{'Databases'}{'All databases'}{'Data Size'}=$totaldbinfo[1];
$result{'Databases'}{'All databases'}{'Data Pct'}=percentage($totaldbinfo[1], $totaldbinfo[3])."%";
$result{'Databases'}{'All databases'}{'Index Size'}=$totaldbinfo[2];
$result{'Databases'}{'All databases'}{'Index Pct'}=percentage($totaldbinfo[2], $totaldbinfo[3])."%";
$result{'Databases'}{'All databases'}{'Total Size'}=$totaldbinfo[3];
foreach (@dblist) {
chomp($_);
if ( $_ eq "information_schema" or $_ eq "performance_schema" or $_ eq "mysql" or $_ eq "" ) { next; }
my @dbinfo=split /\s/, select_one("SELECT TABLE_SCHEMA, SUM(TABLE_ROWS), SUM(DATA_LENGTH), SUM(INDEX_LENGTH) , SUM(DATA_LENGTH+INDEX_LENGTH), COUNT(DISTINCT ENGINE) FROM information_schema.TABLES WHERE TABLE_SCHEMA='$_' GROUP BY TABLE_SCHEMA ORDER BY TABLE_SCHEMA");
next unless defined $dbinfo[0];
infoprint "Database: ".$dbinfo[0]."\n";
infoprint " +-- ROWS : ".(!defined($dbinfo[1]) or $dbinfo[1] eq 'NULL'?0:$dbinfo[1])."\n";
infoprint " +-- DATA : ".hr_bytes($dbinfo[2])."(".percentage($dbinfo[2], $dbinfo[4])."%)\n";
infoprint " +-- INDEX: ".hr_bytes($dbinfo[3])."(".percentage($dbinfo[3], $dbinfo[4])."%)\n";
infoprint " +-- TOTAL: ".hr_bytes($dbinfo[4])."\n";
badprint "Index size is larger than data size for $dbinfo[0] \n" if $dbinfo[2]<$dbinfo[3];
badprint "There ".$dbinfo[5]. " storage engines. Be careful \n" if $dbinfo[5]>1;
$result{'Databases'}{$dbinfo[0]}{'Rows'}=$dbinfo[1];
$result{'Databases'}{$dbinfo[0]}{'Data Size'}=$dbinfo[2];
$result{'Databases'}{$dbinfo[0]}{'Data Pct'}=percentage($dbinfo[2], $dbinfo[4])."%";
$result{'Databases'}{$dbinfo[0]}{'Index Size'}=$dbinfo[3];
$result{'Databases'}{$dbinfo[0]}{'Index Pct'}=percentage($dbinfo[3], $dbinfo[4])."%";
$result{'Databases'}{$dbinfo[0]}{'Total Size'}=$dbinfo[4];
}
}
# Recommandations for MySQL Databases
sub mysql_indexes {
return if ($opt{idxstat} == 0);
prettyprint "\n-------- Indexes Metrics -------------------------------------------------\n";
unless (mysql_version_ge(5,5)) {
infoprint "Skip Index metrics from information schema missing in this version\n";
return;
}
my $selIdxReq= <<'ENDSQL';
SELECT
CONCAT(CONCAT(t.TABLE_SCHEMA, '.'),t.TABLE_NAME) AS 'table'
, CONCAT(CONCAT(CONCAT(s.INDEX_NAME, '('),s.COLUMN_NAME), ')') AS 'index'
, s.SEQ_IN_INDEX AS 'seq'
, s2.max_columns AS 'maxcol'
, s.CARDINALITY AS 'card'
, t.TABLE_ROWS AS 'est_rows'
, ROUND(((s.CARDINALITY / IFNULL(t.TABLE_ROWS, 0.01)) * 100), 2) AS 'sel'
FROM INFORMATION_SCHEMA.STATISTICS s
INNER JOIN INFORMATION_SCHEMA.TABLES t
ON s.TABLE_SCHEMA = t.TABLE_SCHEMA
AND s.TABLE_NAME = t.TABLE_NAME
INNER JOIN (
SELECT
TABLE_SCHEMA
, TABLE_NAME
, INDEX_NAME
, MAX(SEQ_IN_INDEX) AS max_columns
FROM INFORMATION_SCHEMA.STATISTICS
WHERE TABLE_SCHEMA NOT IN ('mysql', 'information_schema', 'performance_schema')
GROUP BY TABLE_SCHEMA, TABLE_NAME, INDEX_NAME
) AS s2
ON s.TABLE_SCHEMA = s2.TABLE_SCHEMA
AND s.TABLE_NAME = s2.TABLE_NAME
AND s.INDEX_NAME = s2.INDEX_NAME
WHERE t.TABLE_SCHEMA NOT IN ('mysql', 'information_schema', 'performance_schema')
AND t.TABLE_ROWS > 10
AND s.CARDINALITY IS NOT NULL
AND (s.CARDINALITY / IFNULL(t.TABLE_ROWS, 0.01)) < 8.00
ORDER BY sel
LIMIT 10;
ENDSQL
my @idxinfo=select_array($selIdxReq);
infoprint "Worst selectivity indexes:\n";
foreach (@idxinfo) {
debugprint "$_\n";
my @info= split /\s/;
infoprint "Index: ".$info[1]."\n";
infoprint " +-- COLUNM : ".$info[0]."\n";
infoprint " +-- NB SEQS : ".$info[2]." sequence(s)\n";
infoprint " +-- NB COLS : ".$info[3]." column(s)\n";
infoprint " +-- CARDINALITY : ".$info[4]." distinct values\n";
infoprint " +-- NB ROWS : ".$info[5]." rows\n";
infoprint " +-- SELECTIVITY : ".$info[6]."%\n";
$result{'Indexes'}{$info[1]}{'Colunm'}=$info[0];
$result{'Indexes'}{$info[1]}{'Sequence number'}=$info[2];
$result{'Indexes'}{$info[1]}{'Number of collunm'}=$info[3];
$result{'Indexes'}{$info[1]}{'Cardianality'}=$info[4];
$result{'Indexes'}{$info[1]}{'Row number'}=$info[5];
$result{'Indexes'}{$info[1]}{'Selectivity'}=$info[6];
if ($info[6] < 25) {
badprint "$info[1] has a low selectivity\n";
}
}
return unless (defined($myvar{'performance_schema'}) and $myvar{'performance_schema'} eq 'ON' );
$selIdxReq= <<'ENDSQL';
SELECT CONCAT(CONCAT(object_schema,'.'),object_name) AS 'table', index_name
FROM performance_schema.table_io_waits_summary_by_index_usage
WHERE index_name IS NOT NULL
AND count_star =0
AND index_name <> 'PRIMARY'
AND object_schema != 'mysql'
ORDER BY count_star, object_schema, object_name;
ENDSQL
@idxinfo=select_array($selIdxReq);
infoprint "Unsused indexes:\n";
push(@generalrec, "Remove unused indexes.") if (scalar(@idxinfo)>0);
foreach (@idxinfo) {
debugprint "$_\n";
my @info= split /\s/;
badprint "Index: $info[1] on $info[0] is not used.\n";
push @{$result{'Indexes'}{'Unused Indexes'}}, $info[0].".".$info[1];
}
}
# Take the two recommendation arrays and display them at the end of the output
sub make_recommendations {
prettyprint "\n-------- Recommendations -----------------------------------------------------\n";
if (@generalrec > 0) {
prettyprint "General recommendations:\n";
foreach (@generalrec) { prettyprint " ".$_."\n"; }
}
if (@adjvars > 0) {
prettyprint "Variables to adjust:\n";
if ($mycalc{'pct_max_physical_memory'} > 90) {
prettyprint " *** MySQL's maximum memory usage is dangerously high ***\n".
" *** Add RAM before increasing MySQL buffer variables ***\n";
}
foreach (@adjvars) { prettyprint " ".$_."\n"; }
}
if (@generalrec == 0 && @adjvars ==0) {
prettyprint "No additional performance recommendations are available.\n"
}
}
sub close_reportfile {
close($fh) if defined($fh);
}
sub headerprint {
prettyprint " >> MySQLTuner $tunerversion - Major Hayden <major\@mhtx.net>\n".
" >> Bug reports, feature requests, and downloads at http://mysqltuner.com/\n".
" >> Run with '--help' for additional options and output filtering\n";
}
sub dump_result {
return unless $opt{'debug'};
$Data::Dumper::Pair = " : ";
print Dumper(\%result);
exit 0;
}
# ---------------------------------------------------------------------------
# BEGIN 'MAIN'
# ---------------------------------------------------------------------------
headerprint # Header Print
mysql_setup; # Gotta login first
os_setup; # Set up some OS variables
get_all_vars; # Toss variables/status into hashes
get_tuning_info; # Get information about the tuning connexion
validate_mysql_version; # Check current MySQL version
check_architecture; # Suggest 64-bit upgrade
check_storage_engines; # Show enabled storage engines
mysql_databases; # Show informations about databases
mysql_indexes; # Show informations about indexes
security_recommendations; # Display some security recommendations
calculations; # Calculate everything we need
mysql_stats; # Print the server stats
mysql_innodb; # Print InnoDB stats
get_replication_status; # Print replication info
make_recommendations; # Make recommendations based on stats
close_reportfile; # Close reportfile if needed
dump_result; # Dump result
# ---------------------------------------------------------------------------
# END 'MAIN'
# ---------------------------------------------------------------------------
__END__
=pod
=encoding UTF-8
=head1 NAME
MySQLTuner 1.5.0 - MySQL High Performance Tuning Script
=head1 IMPORTANT USAGE GUIDELINES
To run the script with the default options, run the script without arguments
Allow MySQL server to run for at least 24-48 hours before trusting suggestions
Some routines may require root level privileges (script will provide warnings)
You must provide the remote server's total memory when connecting to other servers
=head1 CONNECTION AND AUTHENTIFICATION
--host <hostname> Connect to a remote host to perform tests (default: localhost)
--socket <socket> Use a different socket for a local connection
--port <port> Port to use for connection (default: 3306)
--user <username> Username to use for authentication
--pass <password> Password to use for authentication
--mysqladmin <path> Path to a custom mysqladmin executable
--mysqlcmd <path> Path to a custom mysql executable
=head1 PERFORMANCE AND REPORTING OPTIONS
--skipsize Don't enumerate tables and their types/sizes (default: on)
(Recommended for servers with many tables)
--skippassword Don't perform checks on user passwords(default: off)
--checkversion Check for updates to MySQLTuner (default: don't check)
--forcemem <size> Amount of RAM installed in megabytes
--forceswap <size> Amount of swap memory configured in megabytes
--passwordfile <path>Path to a password file list(one password by line)
--reportfile <path> Path to a report txt file
=head1 OUTPUT OPTIONS
--nogood Remove OK responses
--nobad Remove negative/suggestion responses
--noinfo Remove informational responses
--debug Print debug information
--dbstat Print database information
--idxstat Print index information
--nocolor Don't print output in color
--buffers Print global and per-thread buffer values
=head1 PERLDOC
You can find documentation for this module with the perldoc command.
perldoc mysqltuner
=head1 AUTHORS
Major Hayden - major@mhtx.net
=head1 CONTRIBUTORS
=over 4
=item *
Matthew Montgomery
=item *
Paul Kehrer
=item *
Dave Burgess
=item *
Jonathan Hinds
=item *
Mike Jackson
=item *
Nils Breunese
=item *
Shawn Ashlee
=item *
Luuk Vosslamber
=item *
Ville Skytta
=item *
Trent Hornibrook
=item *
Jason Gill
=item *
Mark Imbriaco
=item *
Greg Eden
=item *
Aubin Galinotti
=item *
Giovanni Bechis
=item *
Bill Bradford
=item *
Ryan Novosielski
=item *
Michael Scheidell
=item *
Blair Christensen
=item *
Hans du Plooy
=item *
Victor Trac
=item *
Everett Barnes
=item *
Tom Krouper
=item *
Gary Barrueto
=item *
Simon Greenaway
=item *
Adam Stein
=item *
Isart Montane
=item *
Baptiste M.
=item *
Cole Turner
=item *
Major Hayden
=item *
Joe Ashcraft
=item *
Jean-Marie Renouard
=item *
Jean-Marie Renouard
=back
=head1 SUPPORT
Bug reports, feature requests, and downloads at http://mysqltuner.com/
Bug tracker can be found at https://github.com/major/MySQLTuner-perl/issues
Maintained by Major Hayden (major\@mhtx.net) - Licensed under GPL
=head1 SOURCE CODE
L<https://github.com/major/MySQLTuner-perl>
git clone https://github.com/major/MySQLTuner-perl.git
=head1 COPYRIGHT AND LICENSE
Copyright (C) 2006-2015 Major Hayden - major@mhtx.net
For the latest updates, please visit http://mysqltuner.com/
Git repository available at http://github.com/major/MySQLTuner-perl
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
=cut
# Local variables:
# indent-tabs-mode: t
# cperl-indent-level: 8
# perl-indent-level: 8
# End:
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