Skip to content
Permalink
Branch: master
Find file Copy path
Find file Copy path
Fetching contributors…
Cannot retrieve contributors at this time
864 lines (737 sloc) 39.4 KB
-- Copyright 2018 Tanel Poder. All rights reserved. More info at http://tanelpoder.com
-- Licensed under the Apache License, Version 2.0. See LICENSE.txt for terms & conditions.
--------------------------------------------------------------------------------
--
-- File name: snapper.sql
-- Purpose: An easy to use Oracle session-level performance snapshot utility
--
-- NB! This script does NOT require creation of any database objects!
--
-- This is very useful for ad-hoc performance diagnosis in environments
-- with restrictive change management processes, where creating
-- even temporary tables and PL/SQL packages is not allowed or would
-- take too much time to get approved.
--
-- All processing is done by few sqlplus commands and an anonymous
-- PL/SQL block, all that's needed is SQLPLUS access (and if you want
-- to output data to server-side tracefile then execute rights on
-- DBMS_SYSTEM).
--
-- The output is formatted the way it could be easily post-processed
-- by either Unix string manipulation tools or loaded to spreadsheet.
--
--
-- Author: Tanel Poder
-- Copyright: (c) Tanel Poder - http://www.tanelpoder.com - All rights reserved.
--
--------------------------------------------------------------------------------
--
-- The Session Snapper v2.02
-- (c) Tanel Poder ( http://www.tanelpoder.com )
--
--
-- +-----=====O=== Welcome to The Session Snapper! (Yes, you are looking at a cheap ASCII
-- / imitation of a fish and a fishing rod.
-- | Nevertheless the PL/SQL code below the
-- | fish itself should be helpful for quick
-- | catching of relevant Oracle performance
-- | information.
-- | So I wish you happy... um... snapping?
-- | )
-- | ......
-- | iittii,,....
-- ¿ iiffffjjjjtttt,,
-- ..;;ttffLLLLffLLLLLLffjjtt;;..
-- ..ttLLGGGGGGLLffLLLLLLLLLLLLLLffjjii,, ..ii,,
-- ffGGffLLLLLLjjttjjjjjjjjffLLLLLLLLLLjjii.. ..iijj;;....
-- ffGGLLiittjjttttttiittttttttttffLLLLLLGGffii.. ;;LLLLii;;;;..
-- ffEEGGffiittiittttttttttiiiiiiiittjjjjffLLGGLLii.. iiLLLLLLttiiii,,
-- ;;ffDDLLiiiitt,,ttttttttttttiiiiiiiijjjjjjffLLLLffttiiiiffLLGGLLjjtttt;;..
-- ..ttttjjiitt,,iiiiiittttttttjjjjttttttttjjjjttttjjttttjjjjffLLDDGGLLttii..
-- iittiitttt, ;;iittttttttjjjjjjjjjjttjjjjjjffffffjjjjjjjjjjLLDDGGLLtt;;..
-- jjjjttttii:. ..iiiiffLLGGLLLLLLLLffffffLLLLLLLLLLLLLLLLffffffLLLLLLfftt,,
-- iittttii,,;;,,ttiiiiLLLLffffffjjffffLLLLLLLLffLLffjjttttttttttjjjjffjjii..
-- ,,iiiiiiiiiittttttiiiiiiiiiijjffffLLLLLLLLffLLffttttttii;;;;iiiitttttttt;;..
-- ..iittttttffffttttiiiiiiiiiittttffjjjjffffffffttiittii:: ....,,;;iittii;;
-- ..;;iittttttttttttttttiiiiiittttttttttjjjjjjtttttt;; ..;;ii;;..
-- ..;;;;iittttttjjttiittttttttttttttjjttttttttii.. ....
-- ....;;;;ttjjttttiiiiii;;;;;;iittttiiii..
-- ..;;ttttii;;.... ..;;;;....
-- ..iiii;;..
-- ..;;,,
-- ....
--
--
-- Usage:
--
-- snapper.sql <out|trace[,pagesize=X][,gather=[s][t][w][l][e]]> <seconds_in_snap> <snapshot_count> <sid(s)_to_snap>
--
-- out - use dbms_output.put_line() for output
-- trace - write output to server process tracefile
-- (you must have execute permission on sys.dbms_system.ksdwrt() for that,
-- you can use both out and trace parameters together if you like )
-- pagesize - display header lines after X snapshots. if pagesize=0 don't display
-- any headers. pagesize=-1 will display a terse header only once
-- gather - if omitted, gathers all statistics
-- - if specified, then gather following:
-- s - Session Statistics from v$sesstat
-- t - Session Time model info from v$sess_time_model
-- w - Session Wait statistics from v$session_event and v$session_wait
-- l - instance Latch get statistics ( gets + immediate_gets )
-- e - instance Enqueue lock get statistics
-- b - buffer get Where statistics (instance-wide)
-- a - All above
--
-- sinclude - if specified, then show only V$SESSTAT stats which match the
-- LIKE pattern of sinclude (REGEXP_LIKE in 10g+)
-- linclude - if specified, then show only V$LATCH latch stats which match the
-- LIKE pattern of linclude (REGEXP_LIKE in 10g+)
-- tinclude - if specified, then show only V$SESS_TIME_MODEL stats which match the
-- LIKE pattern of tinclude (REGEXP_LIKE in 10g+)
-- winclude - if specified, then show only V$SESSION_EVENT wait stats which match the
-- LIKE pattern of winclude (REGEXP_LIKE in 10g+)
--
-- you can combine above parameters in any order, separate them by commas
-- (and don't use spaces as otherwise they are treated as following parameters)
--
-- <seconds_in_snap> - the number of seconds between taking snapshots
-- <snapshot_count> - the number of snapshots to take ( maximum value is power(2,31)-1 )
--
-- <sids_to_snap> can be either one sessionid, multiple sessionids separated by
-- commas or a SQL statement which returns a list of SIDs (if you need spaces
-- in that parameter text, enclose it in double quotes).
--
-- if you want to snap ALL sids, use "select sid from v$session" as value for
-- <sids_to_snap> parameter
--
--
-- Examples:
--
-- @snapper out 1 1 515
-- (Output one 1-second snapshot of session 515 using dbms_output and exit
-- Wait, v$sesstat and v$sess_time_model statistics are reported by default)
--
-- @snapper out,gather=w 1 1 515
-- (Output one 1-second snapshot of session 515 using dbms_output and exit
-- only Wait event statistics are reported)
--
-- @snapper out,gather=st 1 1 515
-- (Output one 1-second snapshot of session 515 using dbms_output and exit
-- only v$sesstat and v$sess_Time_model statistics are gathered)
--
-- @snapper trace,gather=stw,pagesize=0 10 90 117,210,313
-- (Write 90 10-second snapshots into tracefile for session IDs 117,210,313
-- all statistics are reported, do not print any headers)
--
-- @snapper trace 900 999999999 "select sid from v$session"
-- (Take a snapshot of ALL sessions every 15 minutes and write the output to trace,
-- loop (almost) forever )
--
-- @snapper out,trace 300 12 "select sid from v$session where username='APPS'"
-- (Take 12 5-minute snapshots of all sessions belonging to APPS user, write
-- output to both dbms_output and tracefile)
--
-- Notes:
--
-- Snapper does not currently detect if a session with given SID has
-- ended and been recreated between snapshots, thus it may report bogus
-- statistics for such sessions. The check and warning for that will be
-- implemented in a future version.
--
--------------------------------------------------------------------------------
set termout off tab off verify off linesize 299
-- Get parameters
define snapper_options="&1"
define snapper_sleep="&2"
define snapper_count="&3"
define snapper_sid="&4"
-- The following code is required for making this script "dynamic" as due
-- different Oracle versions, script parameters or granted privileges some
-- statements might not compile if not adjusted properly.
define _IF_ORA10_OR_HIGHER="--"
define _IF_ORA11_OR_HIGHER="--"
define _IF_LOWER_THAN_ORA11="--"
define _IF_DBMS_SYSTEM_ACCESSIBLE="/* dbms_system is not accessible" /*dummy*/
define _IF_X_ACCESSIBLE="--"
col snapper_oraversion noprint new_value _SNAPPER_ORAVERSION
col snapper_ora10higher noprint new_value _IF_ORA10_OR_HIGHER
col snapper_ora11higher noprint new_value _IF_ORA11_OR_HIGHER
col snapper_ora11lower noprint new_value _IF_LOWER_THAN_ORA11
col dbms_system_accessible noprint new_value _IF_DBMS_SYSTEM_ACCESSIBLE
col x_accessible noprint new_value _IF_X_ACCESSIBLE
col snapper_sid noprint new_value snapper_sid
-- this block determines whether dbms_system.ksdwrt is accessible to us
-- dbms_describe is required as all_procedures/all_objects may show this object
-- even if its not executable by us (thanks to o7_dictionary_accessibility=false)
var v varchar2(100)
var x varchar2(10)
declare
o sys.dbms_describe.number_table;
p sys.dbms_describe.number_table;
l sys.dbms_describe.number_table;
a sys.dbms_describe.varchar2_table;
dty sys.dbms_describe.number_table;
def sys.dbms_describe.number_table;
inout sys.dbms_describe.number_table;
len sys.dbms_describe.number_table;
prec sys.dbms_describe.number_table;
scal sys.dbms_describe.number_table;
rad sys.dbms_describe.number_table;
spa sys.dbms_describe.number_table;
tmp number;
begin
begin
execute immediate 'select count(*) from x$kcbwh where rownum = 1' into tmp;
:x:= ' '; -- x$ tables are accessible, so dont comment any lines out
exception
when others then null;
end;
sys.dbms_describe.describe_procedure(
'DBMS_SYSTEM.KSDWRT', null, null,
o, p, l, a, dty, def, inout, len, prec, scal, rad, spa
);
-- we never get to following statement if dbms_system is not accessible
-- as sys.dbms_describe will raise an exception
:v:= '-- dbms_system is accessible';
exception
when others then null;
end;
/
select
decode(substr(banner, instr(banner, 'Release ')+8,1), '1', '', '--') snapper_ora10higher,
decode(substr(banner, instr(banner, 'Release ')+8,2), '11','', '--') snapper_ora11higher,
decode(substr(banner, instr(banner, 'Release ')+8,2), '11','--', '') snapper_ora11lower,
nvl(:v, '/* dbms_system is not accessible') dbms_system_accessible,
nvl(:x, '--') x_accessible
from
v$version
where
rownum=1;
set termout on serverout on size 1000000 format wrapped
-- main()
declare
-- forward declarations
procedure output(p_txt in varchar2);
procedure fout;
function tptformat( p_num in number,
p_stype in varchar2 default 'STAT',
p_precision in number default 2,
p_base in number default 10,
p_grouplen in number default 3
)
return varchar2;
function getopt( p_parvalues in varchar2,
p_extract in varchar2,
p_delim in varchar2 default ','
)
return varchar2;
-- type, constant, variable declarations
-- trick for holding 32bit UNSIGNED event and stat_ids in 32bit SIGNED PLS_INTEGER
pls_adjust constant number(10,0) := power(2,31) - 1;
type srec is record (stype varchar2(4), sid number, statistic# number, value number );
type stab is table of srec index by pls_integer;
s1 stab;
s2 stab;
type snrec is record (stype varchar2(4), statistic# number, name varchar2(64));
type sntab is table of snrec index by pls_integer;
sn_tmp sntab;
sn sntab;
type sestab is table of v$session%rowtype index by pls_integer;
g_sessions sestab;
g_empty_sessions sestab;
g_count_statname number;
g_count_eventname number;
i number;
a number;
b number;
c number;
delta number;
changed_values number;
pagesize number:=99999999999999;
missing_values_s1 number := 0;
missing_values_s2 number := 0;
disappeared_sid number := 0;
d1 date;
d2 date;
lv_gather varchar2(1000);
lv_header_string varchar2(1000);
lv_data_string varchar2(1000);
-- output column configuration
output_header number := 0; -- 1=true 0=false
output_username number := 1; -- v$session.username
output_sid number := 1; -- sid
output_time number := 0; -- time of snapshot start
output_seconds number := 0; -- seconds in snapshot (shown in footer of each snapshot too)
output_stype number := 1; -- statistic type (WAIT,STAT,TIME,ENQG,LATG,...)
output_sname number := 1; -- statistic name
output_delta number := 1; -- raw delta
output_delta_s number := 0; -- raw delta normalized to per second
output_hdelta number := 0; -- human readable delta
output_hdelta_s number := 1; -- human readable delta normalized to per second
output_percent number := 1; -- percent of total time/samples
output_pcthist number := 1; -- percent of total visual bar (histogram)
/*---------------------------------------------------
-- proc for outputting data to trace or dbms_output
---------------------------------------------------*/
procedure output(p_txt in varchar2) is
begin
if (getopt('&snapper_options', 'out') is not null)
or
(getopt('&snapper_options', 'out') is null and getopt('&snapper_options', 'trace') is null)
then
dbms_output.put_line(p_txt);
end if;
-- The block below is a sqlplus trick for conditionally commenting out PL/SQL code
&_IF_DBMS_SYSTEM_ACCESSIBLE
if getopt('&snapper_options', 'trace') is not null then
sys.dbms_system.ksdwrt(1, p_txt);
sys.dbms_system.ksdfls;
end if;
-- */
end; -- output
/*---------------------------------------------------
-- proc for outputting data, utilizing global vars
---------------------------------------------------*/
procedure fout is
l_output_username VARCHAR2(30);
begin
-- output( 'DEBUG, Entering fout(), b='||to_char(b)||' sn(s2(b).statistic#='||s2(b).statistic# );
-- output( 'DEBUG, In fout(), a='||to_char(a)||' b='||to_char(b)||' s1.count='||s1.count||' s2.count='||s2.count||' s2.count='||s2.count);
if output_username = 1 then
begin
l_output_username := substr(nvl( g_sessions(s2(b).sid).username, substr(g_sessions(s2(b).sid).program, instr(g_sessions(s2(b).sid).program,'(')) ), 1,30);
exception
when no_data_found then l_output_username := 'error';
when others then raise;
end;
end if;
output( CASE WHEN output_header = 1 THEN 'SID= ' END
|| CASE WHEN output_sid = 1 THEN to_char(s2(b).sid,'999999')||', ' END
|| CASE WHEN output_username = 1 THEN rpad(CASE s2(b).sid WHEN -1 THEN ' ' ELSE l_output_username END, 10)||', ' END
|| CASE WHEN output_time = 1 THEN to_char(d1, 'YYYYMMDD HH24:MI:SS')||', ' END
|| CASE WHEN output_seconds = 1 THEN to_char(case (d2-d1) when 0 then &snapper_sleep else (d2-d1) * 86400 end, '9999999')||', ' END
|| CASE WHEN output_stype = 1 THEN s2(b).stype||', ' END
|| CASE WHEN output_sname = 1 THEN rpad(sn(s2(b).statistic#).name, 40, ' ')||', ' END
|| CASE WHEN output_delta = 1 THEN to_char(delta, '999999999999')||', ' END
|| CASE WHEN output_delta_s = 1 THEN to_char(delta/(case (d2-d1) when 0 then &snapper_sleep else (d2-d1) * 86400 end),'999999999')||', ' END
|| CASE WHEN output_hdelta = 1 THEN lpad(tptformat(delta, s2(b).stype), 10, ' ')||', ' END
|| CASE WHEN output_hdelta_s = 1 THEN lpad(tptformat(delta/(case (d2-d1) when 0 then &snapper_sleep else (d2-d1)* 86400 end ), s2(b).stype), 10, ' ')||', ' END
|| CASE WHEN output_percent = 1 THEN CASE WHEN s2(b).stype IN ('TIME','WAIT') THEN to_char(delta/CASE (d2-d1) WHEN 0 THEN &snapper_sleep ELSE (d2-d1) * 86400 END / 10000, '9999.9')||'%,' END END
|| CASE WHEN output_pcthist = 1 THEN CASE WHEN s2(b).stype IN ('TIME','WAIT') THEN rpad(' '||rpad('|', ceil(round(delta/CASE (d2-d1) WHEN 0 THEN &snapper_sleep ELSE (d2-d1) * 86400 END / 100000,1))+1, '@'),12,' ')||'|' END END
);
end;
/*---------------------------------------------------
-- function for converting large numbers to human-readable format
---------------------------------------------------*/
function tptformat( p_num in number,
p_stype in varchar2 default 'STAT',
p_precision in number default 2,
p_base in number default 10, -- for KiB/MiB formatting use
p_grouplen in number default 3 -- p_base=2 and p_grouplen=10
)
return varchar2
is
begin
if p_stype in ('WAIT','TIME') then
return
round(
p_num / power( p_base , trunc(log(p_base,abs(p_num)))-trunc(mod(log(p_base,abs(p_num)),p_grouplen)) ), p_precision
)
|| case trunc(log(p_base,abs(p_num)))-trunc(mod(log(p_base,abs(p_num)),p_grouplen))
when 0 then 'us'
when 1 then 'us'
when p_grouplen*1 then 'ms'
when p_grouplen*2 then 's'
when p_grouplen*3 then 'ks'
when p_grouplen*4 then 'Ms'
else '*'||p_base||'^'||to_char( trunc(log(p_base,abs(p_num)))-trunc(mod(log(p_base,abs(p_num)),p_grouplen)) )||' us'
end;
else
return
round(
p_num / power( p_base , trunc(log(p_base,abs(p_num)))-trunc(mod(log(p_base,abs(p_num)),p_grouplen)) ), p_precision
)
|| case trunc(log(p_base,abs(p_num)))-trunc(mod(log(p_base,abs(p_num)),p_grouplen))
when 0 then ''
when 1 then ''
when p_grouplen*1 then 'k'
when p_grouplen*2 then 'M'
when p_grouplen*3 then 'G'
when p_grouplen*4 then 'T'
when p_grouplen*5 then 'P'
when p_grouplen*6 then 'E'
else '*'||p_base||'^'||to_char( trunc(log(p_base,abs(p_num)))-trunc(mod(log(p_base,abs(p_num)),p_grouplen)) )
end;
end if;
end; -- tptformat
/*---------------------------------------------------
-- simple function for parsing arguments from parameter string
---------------------------------------------------*/
function getopt( p_parvalues in varchar2,
p_extract in varchar2,
p_delim in varchar2 default ','
) return varchar2
is
ret varchar(1000) := NULL;
begin
-- dbms_output.put('p_parvalues = ['||p_parvalues||'] ' );
-- dbms_output.put('p_extract = ['||p_extract||'] ' );
if lower(p_parvalues) like lower(p_extract)||'%'
or lower(p_parvalues) like '%'||p_delim||lower(p_extract)||'%' then
ret :=
nvl (
substr(p_parvalues,
instr(p_parvalues, p_extract)+length(p_extract),
case
instr(
substr(p_parvalues,
instr(p_parvalues, p_extract)+length(p_extract)
)
, p_delim
)
when 0 then length(p_parvalues)
else
instr(
substr(p_parvalues,
instr(p_parvalues, p_extract)+length(p_extract)
)
, p_delim
) - 1
end
)
, chr(0) -- in case parameter was specified but with no value
);
else
ret := null; -- no parameter found
end if;
-- dbms_output.put_line('ret = ['||ret||']');
return ret;
end; -- getopt
/*---------------------------------------------------
-- proc for getting session list with username, osuser, machine etc
---------------------------------------------------*/
procedure get_sessions is
tmp_sessions sestab;
begin
select
*
bulk collect into
tmp_sessions
from
v$session
where
sid in (&snapper_sid);
g_sessions := g_empty_sessions;
for i in 1..tmp_sessions.count loop
g_sessions(tmp_sessions(i).sid) := tmp_sessions(i);
end loop;
end; -- get_sessions
/*---------------------------------------------------
-- proc for querying performance data into collections
---------------------------------------------------*/
procedure snap( p_snapdate in out date, p_stats in out stab ) is
lv_include_stat varchar2(1000) := nvl( lower(getopt('&snapper_options', 'sinclude=' )), '%');
lv_include_latch varchar2(1000) := nvl( lower(getopt('&snapper_options', 'linclude=' )), '%');
lv_include_time varchar2(1000) := nvl( lower(getopt('&snapper_options', 'tinclude=' )), '%');
lv_include_wait varchar2(1000) := nvl( lower(getopt('&snapper_options', 'winclude=' )), '%');
begin
p_snapdate := sysdate;
select *
bulk collect into p_stats
from (
select 'STAT' stype, sid, statistic# - pls_adjust statistic#, value
from v$sesstat
where sid in (&snapper_sid)
and (lv_gather like '%s%' or lv_gather like '%a%')
and statistic# in (select /*+ no_unnest */ statistic# from v$statname
where lower(name) like '%'||lv_include_stat||'%'
&_IF_ORA10_OR_HIGHER or regexp_like (name, lv_include_stat, 'i')
)
--
union all
select
'WAIT', sw.sid,
en.event# + (select count(*) from v$statname) + 1 - pls_adjust,
nvl(se.time_waited_micro,0) + ( decode(se.event||sw.state, sw.event||'WAITING', sw.seconds_in_wait, 0) * 1000000 ) value
from v$session_wait sw, v$session_event se, v$event_name en
where sw.sid = se.sid
and se.event = en.name
and se.sid in (&snapper_sid)
and (lv_gather like '%w%' or lv_gather like '%a%')
and event# in (select event# from v$event_name
where lower(name) like '%'||lv_include_wait||'%'
&_IF_ORA10_OR_HIGHER or regexp_like (name, lv_include_wait, 'i')
)
--
&_IF_ORA10_OR_HIGHER union all
&_IF_ORA10_OR_HIGHER select 'TIME' stype, sid, stat_id - pls_adjust statistic#, value
&_IF_ORA10_OR_HIGHER from v$sess_time_model
&_IF_ORA10_OR_HIGHER where sid in (&snapper_sid)
&_IF_ORA10_OR_HIGHER and (lv_gather like '%t%' or lv_gather like '%a%')
&_IF_ORA10_OR_HIGHER and stat_id in (select stat_id from v$sys_time_model
&_IF_ORA10_OR_HIGHER where lower(stat_name) like '%'||lv_include_time||'%'
&_IF_ORA10_OR_HIGHER or regexp_like (stat_name, lv_include_time, 'i')
&_IF_ORA10_OR_HIGHER )
--
union all
select 'LATG', -1 sid,
l.latch# +
(select count(*) from v$statname) +
(select count(*) from v$event_name) +
1 - pls_adjust statistic#,
l.gets + l.immediate_gets value
from v$latch l
where
(lv_gather like '%l%' or lv_gather like '%a%')
and latch# in (select latch# from v$latchname
where lower(name) like '%'||lv_include_latch||'%'
&_IF_ORA10_OR_HIGHER or regexp_like (name, lv_include_latch, 'i')
)
--
&_IF_X_ACCESSIBLE &_IF_LOWER_THAN_ORA11 union all
&_IF_X_ACCESSIBLE &_IF_LOWER_THAN_ORA11 select 'BUFG', -1 sid,
&_IF_X_ACCESSIBLE &_IF_LOWER_THAN_ORA11 s.indx +
&_IF_X_ACCESSIBLE &_IF_LOWER_THAN_ORA11 (select count(*) from v$statname) +
&_IF_X_ACCESSIBLE &_IF_LOWER_THAN_ORA11 (select count(*) from v$event_name) +
&_IF_X_ACCESSIBLE &_IF_LOWER_THAN_ORA11 (select count(*) from v$latch) +
&_IF_X_ACCESSIBLE &_IF_LOWER_THAN_ORA11 1 - pls_adjust statistic#,
&_IF_X_ACCESSIBLE &_IF_LOWER_THAN_ORA11 s.why0+s.why1+s.why2 value
&_IF_X_ACCESSIBLE &_IF_LOWER_THAN_ORA11 from x$kcbsw s, x$kcbwh w
&_IF_X_ACCESSIBLE &_IF_LOWER_THAN_ORA11 where
&_IF_X_ACCESSIBLE &_IF_LOWER_THAN_ORA11 s.indx = w.indx
&_IF_X_ACCESSIBLE &_IF_LOWER_THAN_ORA11 and s.why0+s.why1+s.why2 > 0
&_IF_X_ACCESSIBLE &_IF_LOWER_THAN_ORA11 and (lv_gather like '%b%' or lv_gather like '%a%')
--
&_IF_X_ACCESSIBLE &_IF_ORA11_OR_HIGHER union all
&_IF_X_ACCESSIBLE &_IF_ORA11_OR_HIGHER select 'BUFG', -1 sid,
&_IF_X_ACCESSIBLE &_IF_ORA11_OR_HIGHER sw.indx +
&_IF_X_ACCESSIBLE &_IF_ORA11_OR_HIGHER (select count(*) from v$statname) +
&_IF_X_ACCESSIBLE &_IF_ORA11_OR_HIGHER (select count(*) from v$event_name) +
&_IF_X_ACCESSIBLE &_IF_ORA11_OR_HIGHER (select count(*) from v$latch) +
&_IF_X_ACCESSIBLE &_IF_ORA11_OR_HIGHER 1 - pls_adjust statistic#,
&_IF_X_ACCESSIBLE &_IF_ORA11_OR_HIGHER why.why0+why.why1+why.why2+sw.other_wait value
&_IF_X_ACCESSIBLE &_IF_ORA11_OR_HIGHER from
&_IF_X_ACCESSIBLE &_IF_ORA11_OR_HIGHER x$kcbuwhy why,
&_IF_X_ACCESSIBLE &_IF_ORA11_OR_HIGHER x$kcbwh dsc,
&_IF_X_ACCESSIBLE &_IF_ORA11_OR_HIGHER x$kcbsw sw
&_IF_X_ACCESSIBLE &_IF_ORA11_OR_HIGHER where
&_IF_X_ACCESSIBLE &_IF_ORA11_OR_HIGHER why.indx = dsc.indx
&_IF_X_ACCESSIBLE &_IF_ORA11_OR_HIGHER and why.why0 + why.why1 + why.why2 + sw.other_wait > 0
&_IF_X_ACCESSIBLE &_IF_ORA11_OR_HIGHER and dsc.indx = sw.indx
&_IF_X_ACCESSIBLE &_IF_ORA11_OR_HIGHER and why.indx = sw.indx
&_IF_X_ACCESSIBLE &_IF_ORA11_OR_HIGHER -- deliberate cartesian join
&_IF_X_ACCESSIBLE &_IF_ORA11_OR_HIGHER and (lv_gather like '%b%' or lv_gather like '%a%')
--
union all
select 'ENQG', -1 sid,
ascii(substr(e.eq_type,1,1))*256 + ascii(substr(e.eq_type,2,1)) +
(select count(*) from v$statname) +
(select count(*) from v$event_name) +
(select count(*) from v$latch) +
&_IF_X_ACCESSIBLE (select count(*) from x$kcbwh) +
1 - pls_adjust statistic#,
e.total_req# value
from v$enqueue_stat e
where
(lv_gather like '%e%' or lv_gather like '%a%')
) snapper_stats
order by sid, stype, statistic#;
end snap;
begin
pagesize := nvl( getopt('&snapper_options', 'pagesize=' ), pagesize);
--output ( 'Pagesize='||pagesize );
-- determine which statistics to collect
lv_gather := case nvl( lower(getopt ('&snapper_options', 'gather=')), 'stw')
when 'all' then 'stw'
else nvl( lower(getopt ('&snapper_options', 'gather=')), 'stw')
end;
--lv_gather:=getopt ('&snapper_options', 'gather=');
--output('lv_gather='||lv_gather);
if pagesize > 0 then
output(' ');
output('-- Session Snapper v2.02 by Tanel Poder ( http://www.tanelpoder.com )');
output(' ');
--output('-- ');
end if;
-- initialize statistic and event name array
-- fetch statistic names with their adjusted IDs
select *
bulk collect into sn_tmp
from (
select 'STAT' stype, statistic# - pls_adjust statistic#, name
from v$statname
where (lv_gather like '%s%' or lv_gather like '%a%')
--
union all
select 'WAIT',
event# + (select count(*) from v$statname) + 1 - pls_adjust, name
from v$event_name
where (lv_gather like '%w%' or lv_gather like '%a%')
--
&_IF_ORA10_OR_HIGHER union all
&_IF_ORA10_OR_HIGHER select 'TIME' stype, stat_id - pls_adjust statistic#, stat_name name
&_IF_ORA10_OR_HIGHER from v$sys_time_model
&_IF_ORA10_OR_HIGHER where (lv_gather like '%t%' or lv_gather like '%a%')
--
union all
select 'LATG',
l.latch# +
(select count(*) from v$statname) +
(select count(*) from v$event_name) +
1 - pls_adjust statistic#,
name
from v$latch l
where (lv_gather like '%l%' or lv_gather like '%a%')
--
&_IF_X_ACCESSIBLE union all
&_IF_X_ACCESSIBLE select 'BUFG',
&_IF_X_ACCESSIBLE indx +
&_IF_X_ACCESSIBLE (select count(*) from v$statname) +
&_IF_X_ACCESSIBLE (select count(*) from v$event_name) +
&_IF_X_ACCESSIBLE (select count(*) from v$latch) +
&_IF_X_ACCESSIBLE 1 - pls_adjust statistic#,
&_IF_X_ACCESSIBLE kcbwhdes name
&_IF_X_ACCESSIBLE from x$kcbwh
&_IF_X_ACCESSIBLE where (lv_gather like '%b%' or lv_gather like '%a%')
--
union all
select 'ENQG',
ascii(substr(e.eq_type,1,1))*256 + ascii(substr(e.eq_type,2,1)) +
(select count(*) from v$statname) +
(select count(*) from v$event_name) +
(select count(*) from v$latch) +
&_IF_X_ACCESSIBLE (select count(*) from x$kcbwh) +
1 - pls_adjust statistic#,
eq_type
from (
select es.eq_type
&_IF_ORA10_OR_HIGHER ||' - '||lt.name
eq_type,
total_req#
from
v$enqueue_stat es
&_IF_ORA10_OR_HIGHER , v$lock_type lt
&_IF_ORA10_OR_HIGHER where es.eq_type = lt.type
) e
where (lv_gather like '%e%' or lv_gather like '%a%')
) snapper_statnames
order by stype, statistic#;
-- store these into an index_by array organized by statistic# for fast lookup
--output('sn_tmp.count='||sn_tmp.count);
--output('lv_gather='||lv_gather);
for i in 1..sn_tmp.count loop
-- output('i='||i||' statistic#='||sn_tmp(i).statistic#);
sn(sn_tmp(i).statistic#) := sn_tmp(i);
end loop;
-- main sampling loop
for c in 1..&snapper_count loop
-- print header if required
lv_header_string :=
CASE WHEN output_header = 1 THEN 'HEAD,' END
|| CASE WHEN output_sid = 1 THEN ' SID,' END
|| CASE WHEN output_username = 1 THEN ' USERNAME ,' END
|| CASE WHEN output_time = 1 THEN ' SNAPSHOT START ,' END
|| CASE WHEN output_seconds = 1 THEN ' SECONDS,' END
|| CASE WHEN output_stype = 1 THEN ' TYPE,' END
|| CASE WHEN output_sname = 1 THEN rpad(' STATISTIC',41,' ')||',' END
|| CASE WHEN output_delta = 1 THEN ' DELTA,' END
|| CASE WHEN output_delta_s = 1 THEN ' DELTA/SEC,' END
|| CASE WHEN output_hdelta = 1 THEN ' HDELTA,' END
|| CASE WHEN output_hdelta_s = 1 THEN ' HDELTA/SEC,' END
|| CASE WHEN output_percent = 1 THEN ' %TIME,' END
|| CASE WHEN output_pcthist = 1 THEN ' GRAPH ' END
;
if pagesize > 0 and mod(c-1, pagesize) = 0 then
output(rpad('-',length(lv_header_string),'-'));
output(lv_header_string);
output(rpad('-',length(lv_header_string),'-'));
else
if pagesize = -1 and c = 1 then
output(lv_header_string);
end if;
end if;
if c = 1 then
get_sessions;
snap(d1,s1);
else
get_sessions;
d1 := d2;
s1 := s2;
end if; -- c = 1
dbms_lock.sleep( (&snapper_sleep - (sysdate - d1)) );
-- dbms_lock.sleep( (&snapper_sleep - (sysdate - d1))*1000/1024 );
get_sessions;
snap(d2,s2);
-- manually coded nested loop outer join for calculating deltas
-- why not use a SQL join? this would require creation of PL/SQL
-- collection object types, but Snapper does not require any changes
-- to the database, so any custom object types are out!
changed_values := 0;
missing_values_s1 := 0;
missing_values_s2 := 0;
-- remember last disappeared SID so we woudlnt need to output a warning
-- message for each statistic row of that disappeared sid
disappeared_sid := 0;
i :=1; -- iteration counter (for debugging)
a :=1; -- s1 array index
b :=1; -- s2 array index
while ( a <= s1.count and b <= s2.count ) loop
delta := 0; -- don't print
case
when s1(a).sid = s2(b).sid then
case
when s1(a).statistic# = s2(b).statistic# then
delta := s2(b).value - s1(a).value;
if delta != 0 then fout(); end if;
a := a + 1;
b := b + 1;
when s1(a).statistic# > s2(b).statistic# then
delta := s2(b).value;
if delta != 0 then fout(); end if;
b := b + 1;
when s1(a).statistic# < s2(b).statistic# then
output('ERROR, s1(a).statistic# < s2(b).statistic#, a='||to_char(a)||' b='||to_char(b)||' s1.count='||s1.count||' s2.count='||s2.count||' s2.count='||s2.count);
a := a + 1;
b := b + 1;
else
output('ERROR, s1(a).statistic# ? s2(b).statistic#, a='||to_char(a)||' b='||to_char(b)||' s1.count='||s1.count||' s2.count='||s2.count||' s2.count='||s2.count);
a := a + 1;
b := b + 1;
end case; -- s1(a).statistic# ... s2(b).statistic#
when s1(a).sid > s2(b).sid then
delta := s2(b).value;
if delta != 0 then fout(); end if;
b := b + 1;
when s1(a).sid < s2(b).sid then
if disappeared_sid != s2(b).sid then
output('WARN, Session has disappeared during snapshot, ignoring SID='||to_char(s2(b).sid)||' debug(a='||to_char(a)||' b='||to_char(b)||' s1.count='||s1.count||' s2.count='||s2.count||' s2.count='||s2.count||')');
end if;
disappeared_sid := s2(b).sid;
a := a + 1;
else
output('ERROR, Should not be here, SID='||to_char(s2(b).sid)||' a='||to_char(a)||' b='||to_char(b)||' s1.count='||s1.count||' s2.count='||s2.count||' s2.count='||s2.count);
end case; -- s1(a).sid ... s2(b).sid
i:=i+1;
if delta != 0 then
changed_values := changed_values + 1;
end if; -- delta != 0
end loop; -- while ( a <= s1.count and b <= s2.count )
if pagesize > 0 and changed_values > 0 then output('-- End of snap '||to_char(c)||', end='||to_char(d2, 'YYYY-MM-DD HH24:MI:SS')||', seconds='||to_char(case (d2-d1) when 0 then &snapper_sleep else round((d2-d1) * 86400, 1) end)); output(''); end if;
end loop; -- for c in 1..snapper_count
end;
/
undefine snapper_oraversion
undefine snapper_sleep
undefine snapper_count
undefine snapper_sid
undefine snapper_options
undefine _IF_ORA10_OR_HIGHER
undefine _IF_ORA11_OR_HIGHER
undefine _IF_LOWER_THAN_ORA11
undefine _IF_DBMS_SYSTEM_ACCESSIBLE
undefine _IF_X_ACCESSIBLE
col snapper_ora10higher clear
col snapper_ora11higher clear
col snapper_ora11lower clear
col dbms_system_accessible clear
set serverout off
You can’t perform that action at this time.