AWR Warehouse - An Introduction (HKOUG)
•Download as PPTX, PDF•
1 like•568 views
This document introduces the Automatic Workload Repository (AWR) Warehouse, which is a way to offload AWR history from Oracle databases to a separate repository instance. This avoids purging AWR data and allows longer retention while preventing growth of the source databases. The document describes the components of AWR, why purging is typically needed, and how the AWR Warehouse configuration and ETL process works to extract, load, and map AWR snapshots to the separate repository database.
Recommended
More Related Content
What's hot
What's hot (20)
Similar to AWR Warehouse - An Introduction (HKOUG)
Similar to AWR Warehouse - An Introduction (HKOUG) (20)
Recently uploaded
Recently uploaded (20)
AWR Warehouse - An Introduction (HKOUG)
- 2. whoami Developer turned Oracle DBA Based in Hong Kong Co-Founder of HKOUG (Hong Kong Oracle User Group) Occasional Blogger (mostly bugs I hit) at jolliffe.hk Twitter @jolliffe https://www.linkedin.com/in/jolliffe
- 3. Contents The Automatic Workload Repository The Case for AWR Warehouse Configuring and Using AWR Warehouse A Couple of Recommendations ETL Process Flow
- 4. The Automatic Workload Repository (AWR)
- 5. The Automatic Workload Repository (AWR) A built-in repository in every (Enterprise Edition) Oracle database Regular snapshots of vital statistics Data stored in SYSAUX tablespace Enabled by default Part of the Diagnostic and Tuning Option ($$$) Either Query data yourself Also tightly integrated with Enterpise Manager
- 6. Active Session History (ASH) Every second the state every non-idle session is recorded (in memory), and exposed as V$ACTIVE_SESSION_HISTORY One in ten moved to persistent storage: DBA_HIST_ACTIVE_SESSION_HISTORY Useful for troubleshooting performance issues after they happen
- 7. The Case for AWR Warehouse
- 8. If AWR is full of useful information…. ...then why do we keep throwing it away?
- 9. Reasons for Purging AWR ▪ It’s the default (for a reason) ▪ Database/SYSAUX Growth leads to ▪ Longer Backups ▪ Longer Upgrades ▪ Querying affects production performance ($$$)
- 10. Enter AWR Warehouse ▪ Offload AWR History to a separate instance ▪ Schedule backups and upgrades separately ▪ Leverage Enterprise Manager for ▪ Target Discovery ▪ Reporting
- 11. Additive Free ▪(Almost) no new tables ▪ Uses current tables (WRH$ exposed as DBA_HIST_) ▪Partitioned by dbid, snap_id ▪Except ▪ Caw_dbid_mapping ▪ ETL process flow
- 12. No Hidden Charges A ... single instance Oracle Database can be ... used as an infrastructure repository for ... Automatic Workload Repository (AWR) Warehouse ... without additional license requirements, provided that all the targets are correctly licensed. It may not be used or deployed for other uses. http://docs.oracle.com/cd/E80920_01/DBLIC/Licensing-Information.htm
- 26. A Couple of Recommendations
- 27. Keep It Separate ▪ A Dedicated Instance ▪ On a Dedicated Host ▪ Not OEM Repository
- 28. Welcome to the Future ▪ Use 12cR2 for the Repository database ▪ Low risk exposure to ▪ New features ▪ New bugs
- 29. ETL Process Flow
- 30. ETL Process Flow - General Points ▪ Use the Source ▪ Separate schedules ▪All objects owned by dbsnmp ▪ Some simplifications ▪ Table Names (CAW_ prefix) ▪ Error Handling
- 31. Enterprise ManagerA AWR R R 1234 B AWR C AWR A B AWR 567891011 Transfer Load Extract Extract Extract A B AWRCAWR Transfer Overview
- 32. 49-6049-63 C extract_metadata snaps transferred 01 24 N 25 48 N 49 72 N 3 day 2 1run_extractrun_extract 123456789101112 49-66 48-72 25-48 01-24 AWR 01 24 N 25 48 N 49 72 N Extract
- 33. Enterprise Manager ZIP C extract_metadata snaps transferred 01 24 N 25 48 N 49 72 N R load_metadata em_id target db_id snaps imported 1 A 101 01 24 N 1 B 102 01 24 N 1 C 103 01 24 N 1 C 103 25 48 N 1 C 103 49 72 N 123456 Y Y Y 1 C 103 01 24 N 1 C 103 25 48 N 1 C 103 49 72 N ZIP ZIPZIP 78 1_xxx_103_01_24.dmp 1_xxx_103_25_48.dmp 1_xxx_103_49_72.dmp 9 Transfer
- 34. AWRLOAD$201AWRLOAD$203AWRLOAD$201AWRLOAD$202AWRLOAD$201 run_worker run_master run_worker run_master 3 day 2 1 load_workers target staging_dir A AWRLOAD$201 B AWRLOAD$202 dbid_mapping target dbid R 042 A 101 B 102 C 103 042 101 103102 R load_metadata target dbid snaps imported A 101 49 72 Y B 102 49 72 Y C 103 01 24 Y C 103 25 48 Y C 103 49 72 Y dbid CAWR N N Y Y NY NY NY A AWRLOAD$201 B AWRLOAD$202 C AWRLOAD$203C AWRLOAD$203 103C 12345678910111213141516171819202122232425 Load SELECT property_value FROM dbsnmp.caw_properties WHERE property_name = 'max_parallel_loads'; PROPERTY_VALUE 2
- 35. In Summary
- 36. AWR Warehouse saves you $$$ Install it, use it Understand how it works