High Waits for Latch 'qmn task queue latch'

High Waits for Latch 'qmn task queue latch' (Doc ID 2054781.1)

Last updated on MAY 22, 2017

Applies to:

Oracle Database - Enterprise Edition - Version 10.2.0.4 and later
Information in this document applies to any platform.

High waits for "qmn task queue latch" on the database, the figures for other latches are much lower.
'Latch free' waits may or may not appear in the "Top 10 Foreground Events by Total Wait Time" waits of the AWR.

AWR report show high activity on the "qmn task queue latch" in various sections:

Latch Activity: - wait time is high

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