Oracle Performance Tools of the Trade
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The document discusses various Oracle performance monitoring tools including Oracle Enterprise Manager (OEM), Automatic Workload Repository (AWR), Automatic Database Diagnostic Monitor (ADDM), Active Session History (ASH), and eDB360. It provides overviews of each tool and examples of using AWR, ADDM, ASH and eDB360 for performance analysis through demos. The conclusions recommend OEM as the primary tool and how the other tools like AWR, ADDM and ASH complement it for deeper performance insights.
![EDB360
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• 360-degree view of an Oracle database
• Database health-check and sizing
• 2 Parameters: Pack License [T|D|N] and Days
– @edb360.sql T 31
• Installs nothing
• Free download and use](https://image.slidesharecdn.com/oracleperformancetoolsofthetrade-141104051216-conversion-gate02/85/Oracle-Performance-Tools-of-the-Trade-46-320.jpg)
Oracle Performance Tools of the Trade
- 1. Oracle Performance Tools of the Trade Carlos Sierra
- 2. • Oracle Performance and SQL Tuning • Consultant/Developer/DBA • eDB360 and eAdam • SQLT and SQLHC • Exadata Carlos Sierra Enkitec (c) 2014 2
- 3. Tools of the Trade • OEM • AWR • ADDM • ASH • EDB360 Enkitec © 2014 3
- 4. OEM • Oracle Enterprise Manager (OEM) – Database Control – Grid Control • GUI Tool for System Monitoring – Including Performance Enkitec © 2014 4
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- 18. AWR • Automatic Workload Repository (AWR) • Requires Oracle Diagnostics Pack License • Set of DBA_HIST views • Periodic Snapshots (1hr apart by default) • 7 days history (by default) Enkitec © 2014 18
- 19. AWR Demo (1) • Go to: carlos-sierra.net • Right-hand side • Downloads – ECO Demos Enkitec © 2014 19
- 20. AWR Demo (2) • Average Active Sessions (AAS)? • DB CPU Utilization? • Do you see any bottlenecks? • What would be your action plan? Enkitec © 2014 20
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- 35. AWR Demo Conclusions (1) • High Parsing – Use of Literals instead of Bind Variables • Some suboptimal SQL wasting CPU cycles • High Background Waits related to DBWR • Write Back Flash Cache disabled – Hard to detect! Enkitec © 2014 35
- 36. AWR Demo Conclusions (2) • 6 copies of Control Files – 2 members in 2 high redundancy disk groups • Thousands of Tablespaces (thus Data Files) • Frequent Log switches due to small size – Think Checkpoints updating SCN on Data Files and Control Files Enkitec © 2014 36
- 37. AWR Demo Conclusions (3) • There is usually more than 1 culprit – Even when performance is fine • Database health-check is like any other – Early detection is preferred • Motto: “if it ain't broke, don't fix it” – Really? – Would you apply this motto to your own health? Enkitec © 2014 37
- 38. Alert Log • As old as Oracle • Like reading your Daily News • Watch for ORA errors – And fix them! • Rename every so often Enkitec © 2014 38
- 39. ADDM (1) • Automatic Database Diagnostic Monitor • Requires Oracle Diagnostics Pack License • Its goal is to reduce DB Time – Wait and CPU time of all non-idle user sessions • Based on AWR data – Hourly execution by default Enkitec © 2014 39
- 40. ADDM (2) • Database, Instance or Partial modes • Available via OEM or SQL*Plus – DBA_ADVISOR_* and DBA_ADDM_* • Question Everything, including “Advice” Enkitec © 2014 40
- 41. Enkitec © 2014 41 ADDM Sample
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- 43. ASH (1) • Active Session History (ASH) • Requires Oracle Diagnostics Pack License • Active Session – On CPU; or – Non-idle Wait Enkitec © 2014 43
- 44. ASH (2) • Snapshot of V$SESSION every second – V$ACTIVE_SESSION_HISTORY – Every 10 seconds on AWR • DBA_HIST_ACTIVE_SESS_HISTORY • Source of truth • Multi-dimension Enkitec © 2014 44
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- 46. EDB360 Enkitec © 2014 46 • 360-degree view of an Oracle database • Database health-check and sizing • 2 Parameters: Pack License [T|D|N] and Days – @edb360.sql T 31 • Installs nothing • Free download and use
- 47. EDB360 Demo (1) • Go to: carlos-sierra.net • Right-hand side • Downloads – ECO Demos Enkitec © 2014 47
- 48. Enkitec © 2014 48 EDB360 Demo (2)
- 49. EDB360 Demo (3) • When was 11.2.0.3 BP21 applied? • Is “_parallel_statement_queuing” modified? • What is CPU peak demand for instance 1? • How many invalid objects? • How many SQL Plan Baselines? • Are CBO System Statistics collected? Enkitec © 2014 49
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- 53. Conclusions • OEM is “the” tool for Oracle Performance • AWR, ADDM and ASH complement OEM • EDB360 allows “offline” analysis • Snapper is a good “session level” tool • SQL Tuning requires the use of specialized tools Enkitec © 2014 53
- 54. References • Oracle Database Performance Tuning Guide 11g Release 2 • Snapper - Tanel Poder – http://blog.tanelpoder.com/files/scripts/snapper 4.sql • http://www.enkitec.com/products/edb360 Enkitec © 2014 54
- 55. Contact Information • carlos.sierra@enkitec.com • carlos-sierra.net • @csierra_usa Enkitec © 2014 55