#.1 sash – simulated ash and other tools. #.2 oemdb optimizer lab 128sash...

#.1

SASH – Simulated ASHand other tools

#.2

OEM DB Optimizer

Lab 128 SASH

performance $100,000 $1500 $500 free

SQL Tuning $100,000 included N/A N/A

Both $200,000 $1500 N/A N/A

Copyright 2006 Kyle Hailey

10 Machines with 4 processors and 1 database each

1 DBA

OEM $5,000 per pack unlimited users

$2,500 per pack with minimum named users

#.3Copyright 2006 Kyle Hailey

Simulating ASH

ASH is new in 10g ASH data exist since V7 Need Diagnostic Pack License Collect it yourself

SASH – Simulated ASHhttp://perfvision.com/sash.php

Graphical Monitorhttp://perfvision.com/ashmon.php

Consumes < 1% CPU for 10 active sessions (a lot)

#.44

Simulating ASH Performance Package License?

$5000/pack/CPU ? Not on 10g ?

Do it yourself V$SESSION 10g most of ASH

Before 10g, join v$session and v$session_wait

Sample every second Store in a table

Free PL/SQL package

v$active_session_historyv$active_session_history v$sessionv$sessionSESSION_ID SID SESSION_ID SID SESSION_SERIAL# SERIAL# SESSION_SERIAL# SERIAL# USER_ID USER# USER_ID USER# SQL_OPCODE COMMAND SQL_OPCODE COMMAND PROGRAM PROGRAM PROGRAM PROGRAM SESSION_TYPE TYPE SESSION_TYPE TYPE SQL_ID SQL_ID SQL_ID SQL_ID SQL_CHILD_NUMBER SQL_CHILD_NUMBER SQL_CHILD_NUMBER SQL_CHILD_NUMBER MODULE MODULE MODULE MODULE ACTION ACTION ACTION ACTION CURRENT_OBJ# ROW_WAIT_OBJ# CURRENT_OBJ# ROW_WAIT_OBJ# CURRENT_FILE# ROW_WAIT_FILE# CURRENT_FILE# ROW_WAIT_FILE# CURRENT_BLOCK# ROW_WAIT_BLOCK# CURRENT_BLOCK# ROW_WAIT_BLOCK# CLIENT_ID CLIENT_IDENTIFIERCLIENT_ID CLIENT_IDENTIFIER BLOCKING_SESSION BLOCKING_SESSION BLOCKING_SESSION BLOCKING_SESSION BLOCKING_SESSION_STATUS BLOCKING_SESSION_STATUS BLOCKING_SESSION_STATUS BLOCKING_SESSION_STATUS SEQ# SEQ# SEQ# SEQ# EVENT# EVENT# EVENT# EVENT# EVENT EVENT EVENT EVENT P1TEXT P1TEXT P1TEXT P1TEXT P1 P1 P1 P1 P2TEXT P2TEXT P2TEXT P2TEXT P2 P2 P2 P2 P3TEXT P3TEXT P3TEXT P3TEXT P3 P3 P3 P3 WAIT_CLASS_ID WAIT_CLASS_ID WAIT_CLASS_ID WAIT_CLASS_ID WAIT_CLASS WAIT_CLASS WAIT_CLASS WAIT_CLASS WAIT_TIME WAIT_TIME WAIT_TIME WAIT_TIME

#.55

ASH extra fields

v$session missing

V$session extras

FORCE_MATCHING_SIGNATURE FORCE_MATCHING_SIGNATURE v$sql.sql_id = sql_idQC_SESSION_ID QCSID v$px_session.sid=sid , serial#QC_INSTANCE_ID QCINST_ID v$px_session.sid=sid , serial#SQL_PLAN_HASH_VALUE PLAN_HASH_VALUE v$sqlstats.sql_id v$sqlstats.sql_id = sql_id (PLAN_HASH_VALUE = x$ksuse.KSUSESPH)XID XID v$transaction.ADDR = taddr

FIXED_TABLE_SEQUENCE - find sql executions ROW_WAIT_ROW# LAST_CALL_ET - how long in current state

#.6

Simulating – Key Ideas session_state = decode(WAIT_TIME, 0,'WAITING', 'ON CPU') v$session where status='ACTIVE' and

ON CPU : wait_time != 0 or Waiting : wait_class != 'Idle‘

select sysdate sample_time,select sysdate sample_time, decode(s.WAIT_TIME, 0,'WAITING','ON CPU') "SESSION_STATE"decode(s.WAIT_TIME, 0,'WAITING','ON CPU') "SESSION_STATE" /* plus other fields *//* plus other fields */ from v$session sfrom v$session s where sid != ( select sid from v$mystat where rownum < 2 )where sid != ( select sid from v$mystat where rownum < 2 ) and ( ( s.status='ACTIVE' and wait_time != 0 )and ( ( s.status='ACTIVE' and wait_time != 0 ) or s.wait_class!='Idle' ) ;or s.wait_class!='Idle' ) ;

9i – join v$session and v$session_wait9i – join v$session and v$session_wait


Sampling Method 7,8,9i, 10g

select s.username, s.sid, s.serial#, s.sql_hash_value, decode(w.wait_time, 0, w.event, 'ON CPU'), w.p1 p1, w.p2 p2, w.p3 p3

select s.username, s.sid, s.serial#, s.sql_hash_value, decode(w.wait_time, 0, w.event, 'ON CPU'), w.p1, w.p2, w.p3

from v$session s, v$session_wait wwhere w.sid=s.sid and s.status='ACTIVE' and s.type='USER'/


Sampling v$session10g

select username, sid, serial#, sql_hash_value, decode(wait_time, 0, event, 'ON CPU'), p1,p2, p3from v$session where status='ACTIVE' and name not in ( select event from v$event_name where wait_class='Idle' ) /


Example of Sampled Data

From the above query we get output like

USERNAME SID SERIAL HASH_VALUE EVENT P1 P2 P3-------- --- ------ ---------- ----------------- -------- ------- ---SYS 64 8717 4116021597 PL/SQL lock timer 300 0 0SYS 58 19467 961168820 ON CPU 16508152 1 0STARGUS 71 6251 1311875676 direct path write 201 2155902 127(CJQ0) 9 1 0 rdbms ipc message 500 0 0

Session Session SQL SQL Wait Wait

USERNAME SID SERIAL HASH_VALUE EVENT P1 P2 P3-------- --- ------ ---------- ----------------- -------- ------- ---SYS 64 8717 4116021597 PL/SQL lock timer 300 0 0SYS 58 19467 961168820 ON CPU 16508152 1 0STARGUS 71 6251 1311875676 direct path write 201 2155902 127(CJQ0) 9 1 0 rdbms ipc message 500 0 0


Example of Sampled Data

From the above query we get output like

USERNAME SID SERIAL HASH_VALUE EVENT P1 P2 P3-------- --- ------ ---------- ----------------- -------- ------- ---SYS 64 8717 4116021597 buffer busy wait 4 2465 220

Wait Wait

filefileblockblock TypeType

USERNAME SID SERIAL HASH_VALUE EVENT P1 P2 P3

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

SYS 64 8717 4116021597 buffer busy wait 4 2465 220

SQL SQL Session Session


V1 - SASH - Simulating ASH

http://perfvision.com/ash.php Install ashpack.sh (UNIX only) Automatically collects

Every 3 secs v$session_wait + v$session 10g just uses v$session – faster

Every Hour collects Top 20 SQL text Top 20 SQL explain plans Top 20 SQL stats Top 20 Object names (not enabled)

Keeps 7 days, purges rest

Needs Partitioning Needs Partitioning OptionOption


SASH - Architecture# REPOSITORY

REPO_SCHEMA=sash

REPO_PW=sash

REPO_SID=cdb

REPO_HOST=cont01.perfvision.com

REPO_PORT=1521

#TARGET

TARG_SCHEMA=sys

TARG_PW="sys as sysdba"

TARG_HOST=`hostname`

TARG_SID=$ORACLE_SID

TARG_HOME=$ORACLE_HOME

Define once

And leave in script ashpack.sh


SASH - Architecture

repositoryrepository

targettarget

targettarget

targettarget

targettarget

Targets run jobs to insert data over db linkTargets run jobs to insert data over db link

ashpack.sh

oracleoracle

oracle oracle

oracle

ashpack.sh

ashpack.sh

ashpack.sh


SASH - Architecture


ASH data partitioned byASH data partitioned by

DBID of TargetDBID of Target

Day of WeekDay of Week

Makes purge fastMakes purge fast

Make queries fastMake queries fast

#.15

V2 SASH

http://ashmasters.com/ash-simulation/ Installs on any platform (no longer UNIX only) Installs on Standard Edition

Uses “poor mans partitioning” “v$active_session_history” is a union on SASH1-SASH7Purging done by truncating the oldest SASH1-7 table


#.16

V2 SASHRepository repo_0_user.sql

optional example of create the “sash” user on repository (as SYS or SYSTEM) repo_1_tables.sql

install schema on repository database (run as SASH user)

Monitored Database targ_1_pkg.sql

install package database to be monitored (run as or sys) targ_2_jobs.sql

start up collection in a job

Optionally repo_2_pkg.sql

Install purge procedure (on repository) repo_3_jobs.sql

Run purge in job (on repository)



SASH - Architecture


targettarget

targettarget

targettarget

targettarget

Targets run jobs to insert data over db linkTargets run jobs to insert data over db link

repo_0_user.sql repo_1_tables.sql repo_2_pkg.sql repo_3_jobs.sql

targ_1_pkg.sql targ_2_jobs.sql




Oracle

Oracle

Oracle

Oracle

Oracle

as SASH userEverything else as SYS or SYSTEM

#.18

Notes on Data MiningNow data extraction:S-ASH creates a view v$active_session_history

scripts are thus compatible with 10g ASH scripts

repo_4_waitgroups.sql To be fully compatible with 10g ASH scripts set up a simulated wait groups (don’t exist before 10g)

repo_5_curdb.sql change the DBID in v$active_session_history view S-ASH can collect data from multiple databases To keep scripts compatible with 10g ASH scripts I define a filter on

DBID in the view v$active_session_history


SQL> @repo_5_curdbSQL> @repo_5_curdb

HOSTHOST------------------------------------------------------------SFLKHAI01SFLKHAI01TORKHAI01TORKHAI01ROMKHAI01ROMKHAI01

Enter value for host: SFLKHAI01Enter value for host: SFLKHAI01

1 row deleted.1 row deleted.1 row created.1 row created.


S-ASH – All DBs

@actallsum HOST ASL GRAPH --------------- ---------- ----------------------- # of cpus ----1----2----3----4--- bsn08 1.83 +++------2- control1 1.82 ++-------2- cont01 1.28 +----- 2 bsn02 .68 ++-- 4 tsukuba10 .53 -- 2 limerock .13 2 bsn03 .06 4 devnode .02 1


Simulating ASH – All DB Details@actallHOST EVENT ASL CNT ---------- ----------------------------------- ------- ---------- bsn02 local write wait .00 1 buffer busy waits .01 5 db file sequential read .01 6 log file sync .01 10 write complete waits .04 36 free buffer waits .17 135 CPU .19 153 ------------------ ------- Sum .44

bsn08 buffer busy waits .02 26 log buffer space .04 47 log file sync .04 47 enqueue .05 52 db file scattered read .10 108 rdbms ipc reply .13 134 local write wait .15 160 db file sequential read .27 281 direct path write .30 309 direct path read .32 336 CPU .38 401 ------------------ ------- Sum 1.38


SASH – DB Detailed AAS@actAnalysis Begin Time : 2007-07-24 11:04:48Analysis End Time : 2007-07-24 11:19:45Start time, mins ago: 15Request Duration : 15Collections : 528Data Values : 3327Elapsed Time: 15 mins

WAIT_EVENT CNT % Active Ave_Act_Sess-------------------------------------- ---------- ------------latch free 10 .3 .02log buffer space 13 .39 .02buffer busy waits 14 .42 .03db file scattered read 15 .45 .03library cache pin 78 2.34 .15log file sync 213 6.4 .4ON CPU 726 21.82 1.38enqueue 855 25.7 1.62db file sequential read 1399 42.05 2.65 ------------sum 6.3


SASH – AAS over time@aveactTM NPTS AVEACT GRAPH CPU WAITS---------------- ------ ------- ---------------------- ---- -----06-AUG 13:00:00 270 .33 +- 2 29 5906-AUG 14:00:00 1040 2.24 ++--------2--- 341 198406-AUG 15:00:00 623 6.67 ++++------2---------- 438 371806-AUG 16:00:00 1088 2.59 ++--------2---- 335 248606-AUG 17:00:00 1104 1.26 ++----- 2 349 104306-AUG 18:00:00 1093 1.38 +++---- 2 663 84206-AUG 19:00:00 1012 1.74 ++------- 2 373 138806-AUG 20:00:00 1131 .99 +---- 2 304 82006-AUG 21:00:00 1111 1.22 ++----- 2 344 101206-AUG 22:00:00 1010 1.66 ++------ 2 414 125906-AUG 23:00:00 1120 1.08 +---- 2 298 91307-AUG 00:00:00 1024 .83 +--- 2 273 57607-AUG 01:00:00 1006 1.74 ++------- 2 319 142807-AUG 02:00:00 1090 2.47 ++--------2---- 347 234507-AUG 03:00:00 687 6.59 +++-------2---------- 382 414207-AUG 04:00:00 1004 1.95 ++++++--- 2 1299 65907-AUG 05:00:00 1104 3.08 +++++-----2------ 1170 222607-AUG 06:00:00 1122 1.91 +++++++-- 2 1582 55807-AUG 07:00:00 1115 1.06 +++--- 2 559 61807-AUG 08:00:00 1140 .81 ++-- 2 403 51907-AUG 09:00:00 1128 .88 ++--- 2 386 601


SASH – AAS over time with waits@aveactnTO_CHAR(STA AAS AAS1 FIRST AAS2 SECOND GRAPH

----------- ------- ----- --------------- ----- --------------- ------------------------06 13:00:00 .30 .11 db file sequent .10 CPU - 206 14:00:00 2.24 .87 direct path wri .49 log file sync ++--------2---06 15:00:00 6.67 2.07 direct path wri 1.93 log file sync ++++------2----------06 16:00:00 2.59 1.01 direct path wri .57 log file sync ++--------2----06 17:00:00 1.26 .63 log file sync .32 CPU ++----- 206 18:00:00 1.38 .61 CPU .45 log file sync +++---- 206 19:00:00 1.86 .97 log file sync .39 CPU ++------- 206 20:00:00 .99 .38 log file sync .27 CPU +---- 206 21:00:00 1.22 .57 log file sync .31 CPU ++----- 206 22:00:00 1.66 .81 log file sync .41 CPU ++------ 206 23:00:00 1.08 .49 log file sync .27 CPU +---- 207 00:00:00 .83 .37 log file sync .27 CPU +--- 207 01:00:00 1.74 .96 log file sync .31 CPU ++------- 207 02:00:00 2.48 1.21 direct path wri .52 log file sync ++--------2----07 03:00:00 6.59 2.63 direct path wri 1.58 log file sync +++-------2----------07 04:00:00 1.95 1.29 CPU .27 log file sync ++++++--- 207 05:00:00 3.08 1.05 CPU .83 enqueue +++++-----2------


Aveact.sql


““-” = WAIT-” = WAIT

““+” = CPU+” = CPU

which waits ? -> aveactn.sqlwhich waits ? -> aveactn.sql

#.26

Aveactn.sql



SASH – SQL longest running @@longsql.sql

START_TIME COUNT(*) SQL_ID FIXED_TABLE_SEQUENCE TOPN ------------ ---------- ---------- -------------------- ---------- JUN-01 02:00 29 795857215 34254 1 JUN-01 02:00 29 795857215 34547 1 JUN-01 02:00 29 986013188 34305 1 JUN-01 02:15 105 452165714 35961 1 JUN-01 02:15 102 866152581 35999 2 JUN-01 02:30 119 2586830956 39017 1 JUN-01 02:30 109 452165714 39130 2

Using v$session fixed_table_sequence and sql_hash Using v$session fixed_table_sequence and sql_hash


ASHMON a free “OEM-lite” http://perfvision.com/ashmon.php Windows application Monitors Oracle 10g or 11 Show “Top Activity” page from OEM

Note: Can be used on any version of Oracle with performance repository available on http://perfvision.com/sash.php

#.29

ASHMON

06/05/0806/05/08

#.30

Swingbench

Simulated DB activity http://www.dominicgiles.com

#.31

ASHMON Aggregates Drilldowns Time Slicing Guidance

3105/03/2305/03/23


CPU > Max CPU


Radical Change in Profile

#.34

$5K/CPU$5K/CPU

Oracle DatabaseOracle Database

=


OEMOEM ASHMONASHMON

DB OptimizerDB Optimizer

HSQL – local DBHSQL – local DB

licensedlicensed

sys/systemsys/system

V$active_session_historyV$active_session_history

FreeFree

sashsash

V$active_session_historyV$active_session_history

FreeFree

$1500 unlimited


Quest – Performance Analyzer Good interface SGA direct access only

Good – fast, low impactBad – difficult to install and administer


Quest


Symantec’s I3 End to End monitoring Right Data Complicated to Install and administer


Symantec


Symantec I3


Lab 128 Easy Fast Cheap Great data analysis Collects right information Complicated interface - “Geeks tool” No Analysis


Confio’s Ignite

#.44

DB Optimizer



Lab128


Summary ToolsTools

Quest Performance Analyst

Confio’s Ignite Symantec’s I3 Lab128 DB Optimizer

Free but no graphics SASH

Your custom queries Simulated ASH

#.47

OEM DB Optimizer

Lab 128 SASH

performance $100,000 $1500 $500 free

SQL Tuning $100,000 included N/A N/A

Both $200,000 $1500 N/A N/A


10 Machines with 4 processors and 1 database each

1 DBA

OEM $5,000 per pack unlimited users

$2,500 per pack with minimum named users

#.1 sash – simulated ash and other tools. #.2 oemdb optimizer lab 128sash...

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