MErge beetween all staff related to Galera Cluster

mysqltuner.pl

@@ -1,5 +1,5 @@
 #!/usr/bin/env perl
-# mysqltuner.pl - Version 1.7.0
+# mysqltuner.pl - Version 1.7.1
 # High Performance MySQL Tuning Script
 # Copyright (C) 2006-2016 Major Hayden - major@mhtx.net
 #
@@ -31,6 +31,7 @@
 #   Simon Greenaway        Adam Stein           Isart Montane
 #   Baptiste M.            Cole Turner          Major Hayden
 #   Joe Ashcraft           Jean-Marie Renouard  Christian Loos
+#   Julien Francoz
 #
 # Inspired by Matthew Montgomery's tuning-primer.sh script:
 # http://forge.mysql.com/projects/view.php?id=44
@@ -54,7 +55,7 @@ package main;
 #use Env;
 
 # Set up a few variables for use in the script
-my $tunerversion = "1.7.0";
+my $tunerversion = "1.7.1";
 my ( @adjvars, @generalrec );
 
 # Set defaults
@@ -5064,24 +5065,47 @@ sub mariadb_galera {
     {
         badprint "gcs.limit should be equal to 5 * wsrep_slave_threads";
         push @adjvars, "gcs.limit= wsrep_slave_threads * 5";
+    } else {
+        goodprint "wsrep_slave_threads is equal to 3 or 4 times number of CPU(s)";
     }
-    else {
-        goodprint "gcs.limit is equal to 5 * wsrep_slave_threads";
+
+    if (get_wsrep_option('wsrep_slave_threads') > 1) {
+  badprint "wsrep parallel slave can cause frequent inconsistency crash.";
+        push @adjvars, "Set wsrep_slave_threads to 1 in case of HA_ERR_FOUND_DUPP_KEY crash on slave";
+        # check options for parallel slave
+        if (get_wsrep_option('wsrep_slave_FK_checks') eq "OFF") {
+            badprint "wsrep_slave_FK_checks is off with parallel slave";
+            push @adjvars, "wsrep_slave_FK_checks should be ON when using parallel slave";
+        }
+  # wsrep_slave_UK_checks seems useless in MySQL source code
+        if ($myvar{'innodb_autoinc_lock_mode'} != 2) {
+            badprint "innodb_autoinc_lock_mode is incorrect with parallel slave";
+            push @adjvars, "innodb_autoinc_lock_mode should be 2 when using parallel slave";
+        }
+    }
+
+    if (get_wsrep_option('gcs.fc_limit') != $myvar{'wsrep_slave_threads'} * 5 ) {
+        badprint "gcs.fc_limit should be equal to 5 * wsrep_slave_threads";
+        push @adjvars, "gcs.fc_limit= wsrep_slave_threads * 5";
+    } else {
+        goodprint "gcs.fc_limit is equal to 5 * wsrep_slave_threads";
     }
-    if ( get_wsrep_option('gcs.fc_factor') == 0.8 ) {
+
+    if (get_wsrep_option('gcs.fc_factor') != 0.8 ) {
         badprint "gcs.fc_factor should be equal to 0.8";
         push @adjvars, "gcs.fc_factor=0.8";
     }
     else {
-        goodprint "gcs.limit is equal to 5 * wsrep_slave_threads";
+        goodprint "gcs.fc_factor is equal to 0.8";
     }
-    if ( get_wsrep_option('wsrep_flow_control_paused') > 0.02 ) {
+   if ( get_wsrep_option('wsrep_flow_control_paused') > 0.02 ) {
         badprint "Fraction of time node pause flow control > 0.02";
     }
     else {
         goodprint
 "Flow control fraction seems to be OK (wsrep_flow_control_paused<=0.02)";
     }
+
     if ( scalar(@primaryKeysNbTables) > 0 ) {
         badprint "Following table(s) don't have primary key:";
         foreach my $badtable (@primaryKeysNbTables) {
@@ -6034,7 +6058,7 @@ sub which {
 
 =head1 NAME
 
- MySQLTuner 1.7.0 - MySQL High Performance Tuning Script
+ MySQLTuner 1.7.1 - MySQL High Performance Tuning Script
 
 =head1 IMPORTANT USAGE GUIDELINES