AWR or STATSPACK Snapshot collection extremely slow in 11gR2
(Doc ID 1392603.1)
Last updated on FEBRUARY 20, 2019
Applies to:Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Backup Service - Version N/A and later
Information in this document applies to any platform.
Creating AWR or STATSPACK Snapshots may experience extremely poor performance.
Very poor performance while attempting to generate a snapshot for either the AWR ( automatic workload repository ) or Statspack reports.
More specifically this may show as following:
- Very poor insert times on WRH$_TEMPSTATXS or STATS$FILESTATXS
- Cartesian joins for queries used in the generation of the performance report snapshots
None may be known or stated although this performance problem is often associated with a migration to 220.127.116.11 , 18.104.22.168 or 22.214.171.124.
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