Encountered 'Latch Free' Wait Event, 'Object Stats Modification' Upgrade from 12.1 to 19c
(Doc ID 2778826.1)
Last updated on APRIL 17, 2023
Applies to:
Oracle Database - Enterprise Edition - Version 19.10.0.0.0 and laterInformation in this document applies to any platform.
Symptoms
- 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 TimeEvent 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
Changes
Upgrade from 12.1.0.2 to 19c.
Cause
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In this Document
| Symptoms |
| Changes |
| Cause |
| Solution |
| References |