Wait Event "enq: ZZ - Update Hash Tables" Consuming Half Of The DB Time On Oracle RAC (Doc ID 1620752.1)

Last updated on NOVEMBER 14, 2016

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.2 and later
Information in this document applies to any platform.

Goal

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.
 

Solution

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