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Look Before You Leap! Oracle 11g Real Application Testing Gavin Soorma, Senior Oracle DBA, HBOSA.

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Presentation on theme: "Look Before You Leap! Oracle 11g Real Application Testing Gavin Soorma, Senior Oracle DBA, HBOSA."— Presentation transcript:

1 Look Before You Leap! Oracle 11g Real Application Testing Gavin Soorma, Senior Oracle DBA, HBOSA

2 Change Management and its challenges Change is mandatory – Legal compliance, security, product support Change is technology driven to enable business to have a competitive edge Significant time, effort and money is spent before system changes can be successfully deployed in a production environment Many issues go undetected until production deployment adversely affecting application availability, user confidence and reputation Inability of test scripts and simulation tools to test using real production workloads. Test workloads not accurate representations of peak production workloads.

3 Oracle 11g Real Application Testing Two Components –Database Replay –SQL Performance Analyzer Capture live workload on production system Replay production workload on test system with the same timing, concurrency, dependency and transactional properties of the original workload Testing cycles for complex applications is reduced from months to few days – faster deployment Reduce cost of change and risk of change

4 Database Replay With Database Replay, DBAs and System Administrators can test: Database upgrades, patches, parameter, schema changes, etc. Configuration changes such as conversion from a single instance to RAC,ASM, etc. Storage, network, interconnect changes Operating system migrations Hardware migrations Patches, upgrades, Database parameter changes **Database Upgrades – to 11g is now supported**

5 SPA – SQL Performance Analyzer Predict regression in SQL statements performance before end users are affected. Assess impact of change on SQL response time Unit testing of single SQL or set of SQL statements Optimizer version changes, access path changes, database parameter changes, index addition and deletion etc Database Replay Replay real database workload Assess impact of change on total workload throughput SPA What if analysis and predicts deviations in SQL performance Assess impact of change on SQL response time

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7 apex:/u01/oracle/scripts> cat load.sh for i in do echo Running Query $i... echo sqlplus -s sh/sh < cat query.sql select b.country_id,country_name,sum(quantity_sold),sum(amount_sold) from sales a, customers b,countries c where a.cust_id=b.cust_id and b.country_id =c.country_id and a.cust_id=987 group by b.country_id,country_name /... select b.country_id,country_name,sum(quantity_sold),sum(amount_sold) from sales a, customers b,countries c where a.cust_id=b.cust_id and b.country_id =c.country_id and a.cust_id=1660 group by b.country_id,country_name /

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16 SQL> SELECT INDEX_NAME FROM USER_INDEXES WHERE TABLE_NAME='SALES'; INDEX_NAME SALES_PROD_BIX SALES_CUST_BIX SALES_TIME_BIX SALES_CHANNEL_BIX SALES_PROMO_BIX SQL> ALTER INDEX SALES_PROD_BIX INVISIBLE; Index altered. SQL> ALTER INDEX SALES_CUST_BIX INVISIBLE; Index altered. SQL> ALTER INDEX SALES_TIME_BIX INVISIBLE; Index altered. SQL> ALTER INDEX SALES_CHANNEL_BIX INVISIBLE; Index altered. SQL> ALTER INDEX SALES_PROMO_BIX INVISIBLE; Index altered. SQL> SHOW PARAMETER USE_INVISIBLE NAME TYPE VALUE optimizer_use_invisible_indexes boolean FALSE

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26 Database Replay Workflow Workload Capture External client requests to the database tracked and stored in binary files called capture files Workload Processing Before replay, captured workload files have to be processed. Process once – replay many times Transforms captured data into replay files Workload Replay Replay Clients will run the captured and processed workload files on the target server Analysis and Reporting Analyze capture and replay and report any errors or divergence in data. Compare AWR reports gathered at both capture and replay and provide comparison reports

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33 apex:/u01/oracle/capture> ls -l total rw-r oracle dba 1131 Jul 29 14:02 wcr_4j3pkch00384c.rec -rw-r oracle dba 1152 Jul 29 14:02 wcr_4j3pkch003n6y.rec -rw-r oracle dba 1078 Jul 29 14:02 wcr_4j3pkch003s46.rec -rw-r oracle dba 904 Jul 29 14:02 wcr_4j3pkcs00245s.rec -rw-r oracle dba 8648 Jul 29 14:02 wcr_4j3pkcs00284k.rec -rw-r oracle dba 904 Jul 29 14:02 wcr_4j3pkd000202y.rec -rw-r oracle dba 1133 Jul 29 14:02 wcr_4j3pkd0003s50.rec -rw-r oracle dba 1131 Jul 29 14:02 wcr_4j3pkd4003s3h.rec -rw-r oracle dba 1460 Jul 29 14:11 wcr_4j3pkd8003h0c.rec -rw-r oracle dba 1133 Jul 29 14:02 wcr_4j3pkds002h0w.rec -rw-r oracle dba 916 Jul 29 14:02 wcr_4j3pkds003c6q.rec -rw-r oracle dba 1132 Jul 29 14:02 wcr_4j3pkf8002c14.rec -rw-r oracle dba 1145 Jul 29 14:02 wcr_4j3pkg0003w6k.rec -rw-r oracle dba Jul 29 14:15 wcr_ca.dmp -rw-r oracle dba Jul 29 14:15 wcr_ca.log -rw-r oracle dba Jul 29 14:11 wcr_cr.html -rw-r oracle dba Jul 29 14:11 wcr_cr.text -rw-r oracle dba 306 Jul 29 14:11 wcr_fcapture.wmd -rw-r oracle dba 236 Jul 29 14:02 wcr_scapture.wmd

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43 Start The Replay Clients apex:/u01/oracle/capture> wrc replaydir=/u01/oracle/capture userid=system password=oracle Workload Replay Client: Release Production on Tue Jul 29 14:41: Copyright (c) 1982, 2007, Oracle. All rights reserved. Wait for the replay to start (14:41:23)

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51 Thanks for attending!! A Q & Q U E S T I O N S A N S W E R S GAVIN SOORMA Senior Oracle DBA Specialist HBOS Australia Contact me at : or


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