Latch: Row Cache Objects Contention with Parallel Hints on dc_rollback_segments
Last updated on APRIL 18, 2017
Applies to:Oracle Database - Enterprise Edition - Version 22.214.171.124 to 126.96.36.199 [Release 11.2]
Information in this document applies to any platform.
- High "latch: row cache objects" event contention observed when executing query with parallel hints.
- This issue may be reported when using Parallelism in the Select Clause and CTAS Queries with PARALLEL Hints
- Contention seen on the "latch: row cache objects" wait event and high gets on the dc_rollback_segments rowcache together with ktuGetUsegDba() involved in the waiting session stacks.
Database Upgrade to 188.8.131.52.0, 11,2.3.0 or 184.108.40.206
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