Snapper v2.SQL

7/30/2019 Snapper v2.SQL

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------------------------------------------------------------------------------------ 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 spreadshee

t.------ 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 acheap ASCII-- / imitation of a fish and afishing 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;;


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-- Usage:---- snapper.sql ---- 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 onlyonce-- 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$session_event andv$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$SESSTAT stats which matchthe-- LIKE pattern of sinclude (REGEXP_LIKE in 10g+)-- linclude - if specified, then show only V$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+)


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-- winclude - if specified, then show only V$SESSION_EVENT wait stats which match the-- LIKE pattern of winclude (REGEXP_LIKE in 10g+)---- you can combine above parameters in any order, separate them by commas-- (and don't use spaces as otherwise they are treated as following parameters)---- - the number of seconds between taking snapshots-- - the number of snapshots to take ( maximum value is power(2,31)-1 )---- can be either one sessionid, multiple sessionids separated by-- commas or a SQL statement which returns a list of SIDs (if you need spaces-- in that parameter text, enclose it in double quotes).---- if you want to snap ALL sids, use "select sid from v$session" as value for-- 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.


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----------------------------------------------------------------------------------

set termout off tab off verify off linesize 299

-- Get parametersdefine 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_ORAVERSIONcol snapper_ora10higher noprint new_value _IF_ORA10_OR_HIGHER

col snapper_ora11higher noprint new_value _IF_ORA11_OR_HIGHERcol snapper_ora11lower noprint new_value _IF_LOWER_THAN_ORA11col dbms_system_accessible noprint new_value _IF_DBMS_SYSTEM_ACCESSIBLEcol x_accessible noprint new_value _IF_X_ACCESSIBLEcol 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

beginexecute immediate 'select count(*) from x$kcbwh where rownum = 1' into t

mp;


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:x:= ' '; -- x$ tables are accessible, so dont comment any lines outexception

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';

exceptionwhen others then null;

end;/

selectdecode(substr(banner, instr(banner, 'Release ')+8,1), '1', '', '--') snappe

r_ora10higher,decode(substr(banner, instr(banner, 'Release ')+8,2), '11','', '--') snappe

r_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

fromv$version

whererownum=1;

set termout on serverout on size 1000000 format wrapped

-- main()

declare

-- forward declarationsprocedure 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_I


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NTEGERpls_adjust constant number(10,0) := power(2,31) - 1;

type srec is record (stype varchar2(4), sid number, statistic# number, valuenumber );

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 configurationoutput_header number := 0; -- 1=true 0=falseoutput_username number := 1; -- v$session.usernameoutput_sid number := 1; -- sidoutput_time number := 0; -- time of snapshot startoutput_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 deltaoutput_delta_s number := 0; -- raw delta normalized to per secondoutput_hdelta number := 0; -- human readable deltaoutput_hdelta_s number := 1; -- human readable delta normalized to per secon

doutput_percent number := 1; -- percent of total time/samplesoutput_pcthist number := 1; -- percent of total visual bar (histogram)

/*----------------------------------------------------- proc for outputting data to trace or dbms_output


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---------------------------------------------------*/procedure output(p_txt in varchar2) isbegin

if (getopt('&snapper_options', 'out') is not null)or

(getopt('&snapper_options', 'out') is null and getopt('&snapper_options', 'trace') is null)

thendbms_output.put_line(p_txt);

end if;

-- The block below is a sqlplus trick for conditionally commenting out PL/SQL code

&_IF_DBMS_SYSTEM_ACCESSIBLEif 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 isl_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 thenbegin

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#).nam

e, 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) w


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hen 0 then &snapper_sleep else (d2-d1) * 86400 end),'999999999')||', ' END|| CASE WHEN output_hdelta = 1 THEN lpad(tptformat(delta, s2(b).s

type), 10, ' ')||', ' END|| CASE WHEN output_hdelta_s = 1 THEN lpad(tptformat(delta/(case (d

2-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 formattin

g use

p_grouplen in number default 3 -- p_base=2 and p_grouplen=10)return varchar2

isbegin

if p_stype in ('WAIT','TIME') then

returnround(

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_nu

m)))-trunc(mod(log(p_base,abs(p_num)),p_grouplen)) )||' us'end;

else

returnround(

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 ''


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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_nu

m)))-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 varchar2is

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

) - 1end

), chr(0) -- in case parameter was specified but with no valu

e);

else


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ret := null; -- no parameter foundend if;

-- dbms_output.put_line('ret = ['||ret||']');

return ret;

end; -- getopt

/*----------------------------------------------------- proc for getting session list with username, osuser, machine etc---------------------------------------------------*/

procedure get_sessions istmp_sessions sestab;

begin

select*

bulk collect intotmp_sessions

fromv$session

wheresid in (&snapper_sid);

g_sessions := g_empty_sessions;

for i in 1..tmp_sessions.count loopg_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=' )), '%');

beginp_snapdate := sysdate;

select *bulk collect into p_statsfrom (

select 'STAT' stype, sid, statistic# -pls_adjust statistic#, value

from v$sesstatwhere sid in (&snapper_sid)and (lv_gather like '%s%' or lv_gather

like '%a%')


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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 allselect

'WAIT', sw.sid,en.event# + (select count(*) fro

m 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_eventse, v$event_name en

where sw.sid = se.sidand se.event = en.nameand se.sid in (&snapper_sid)and (lv_gather like '%w%' or lv_gathe

r 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_gathe

r 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 allselect 'LATG', -1 sid,

l.latch# +(select count(*) from v$statn

ame) +(select count(*) from v$event

_name) +1 - pls_adjust statistic#,

l.gets + l.immediate_gets valuefrom v$latch lwhere

(lv_gather like '%l%' or lv_gatherlike '%a%')

and latch# in (select latch# from v$lat


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chnamewhere 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$stat

name) +&_IF_X_ACCESSIBLE &_IF_LOWER_THAN_ORA11 (select count(*) from v$even

t_name) +&_IF_X_ACCESSIBLE &_IF_LOWER_THAN_ORA11 (select count(*) from v$latc

h) +&_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_gath

er 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$stat

name) +&_IF_X_ACCESSIBLE &_IF_ORA11_OR_HIGHER (select count(*) from v$even

t_name) +&_IF_X_ACCESSIBLE &_IF_ORA11_OR_HIGHER (select count(*) from v$latc

h) +&_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.ot

her_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_gath

er like '%a%')

--union allselect '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


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) +&_IF_X_ACCESSIBLE (select count(*) from x$kcbwh

) +1 - pls_adjust statistic#,

e.total_req# valuefrom v$enqueue_stat ewhere

(lv_gather like '%e%' or lv_gather like '%a%')

) snapper_statsorder by sid, stype, statistic#;

end snap;

begin

pagesize := nvl( getopt('&snapper_options', 'pagesize=' ), pagesize);--output ( 'Pagesize='||pagesize );

-- determine which statistics to collectlv_gather := case nvl( lower(getopt ('&snapper_options', 'gather=')), 'stw')

when 'all' then 'stw'else nvl( lower(getopt ('&snapper_options', 'gather=')), 'st

w')

end;

--lv_gather:=getopt ('&snapper_options', 'gather=');--output('lv_gather='||lv_gather);

if pagesize > 0 thenoutput(' ');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 IDsselect *bulk collect into sn_tmpfrom (

select 'STAT' stype, statistic# - pls_adjust statistic#, name

from v$statnamewhere (lv_gather like '%s%' or lv_gather like '

%a%')

--union allselect 'WAIT',

event# + (select count(*) from v$statname) + 1 - pls_adjust, name

from v$event_namewhere (lv_gather like '%w%' or lv_gather like '

%a%')--

&_IF_ORA10_OR_HIGHER union all


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&_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 allselect 'LATG',

l.latch# +(select count(*) from v$statname) +(select count(*) from v$event_name) +1 - pls_adjust statistic#,

namefrom v$latch lwhere (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 allselect '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_typefrom (

select es.eq_type&_IF_ORA10_OR_HIGHER ||' - '||lt.name

eq_type,total_req#

fromv$enqueue_stat es

&_IF_ORA10_OR_HIGHER , v$lock_type lt&_IF_ORA10_OR_HIGHER where es.eq_type = lt.type

) ewhere (lv_gather like '%e%' or lv_gather like '

%a%')) snapper_statnamesorder 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#);


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sn(sn_tmp(i).statistic#) := sn_tmp(i);end loop;

-- main sampling loopfor c in 1..&snapper_count loop

-- print header if requiredlv_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 thenoutput(rpad('-',length(lv_header_string),'-'));output(lv_header_string);output(rpad('-',length(lv_header_string),'-'));

elseif 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;


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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 siddisappeared_sid := 0;

i :=1; -- iteration counter (for debugging)a :=1; -- s1 array index

b :=1; -- s2 array index

while ( a


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nt||' 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 thenoutput('WARN, Session has disappeared during snapshot, i

gnoring 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 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_oraversionundefine snapper_sleepundefine snapper_countundefine snapper_sidundefine snapper_optionsundefine _IF_ORA10_OR_HIGHERundefine _IF_ORA11_OR_HIGHERundefine _IF_LOWER_THAN_ORA11undefine _IF_DBMS_SYSTEM_ACCESSIBLE


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undefine _IF_X_ACCESSIBLEcol snapper_ora10higher clearcol snapper_ora11higher clearcol snapper_ora11lower clearcol dbms_system_accessible clear

set serverout off

Snapper v2.SQL

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