Encountered 'Latch Free' Wait Event, 'Object Stats Modification' Upgrade from 12.1 to 19c
(Doc ID 2778826.1)
Last updated on MAY 12, 2022
Applies to:Oracle Database - Enterprise Edition - Version 126.96.36.199.0 and later
Information in this document applies to any platform.
- Facing high 'latch Free' Wait Event with latch name 'object stats modification' after upgrade from 12.1 to 19c:
Top 10 Foreground Events by Total Wait Time
Event Waits Total Wait Time (sec) Avg Wait % DB time Wait Class
DB CPU 61.6K 85.0
latch free 56,463 1917.8 33.97ms 2.6 Other
Latch Miss Sources
Latch Name Where NoWait Misses Sleeps Waiter Sleeps
object stats modification ksoslinentry 0 53,515 53,520
Upgrade from 188.8.131.52 to 19c.
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