High Waits for 'library cache lock' and 'library cache: mutex' Contention with Application Client Connection Timeouts and Associated ORA-03136 Errors
Last updated on SEPTEMBER 29, 2017
Applies to:Oracle Database - Enterprise Edition - Version 18.104.22.168 and later
Information in this document applies to any platform.
- Database hangs
- High waits for 'library cache lock' and 'library cache: mutex'.
- AWR from problem period shows a huge increase in logins from the application side. For example, from 2300 to 6000 within an hour.
- AWR shows high sleep counts against library cache mutexes
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