Wait Event "enq: ZZ - Update Hash Tables" Consuming Half Of The DB Time On Oracle RAC
(Doc ID 1620752.1)
Last updated on MARCH 02, 2019
Applies to:Oracle Database - Enterprise Edition - Version 18.104.22.168 and later
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Information in this document applies to any platform.
This note discussed the wait event "enq: ZZ - update hash tables". This can be quite often seen as the most prominent wait event in the RAC databases if there are very frequent context switches.
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