High Version Counts on Recursive SQL Statements
(Doc ID 1453302.1)
Last updated on AUGUST 04, 2018
Applies to:Oracle Database - Enterprise Edition - Version 126.96.36.199.0 and later
Information in this document applies to any platform.
- Database appears to be hung, users unable to connect to sqlplus or its very slow
- AWR report shows some of the following events in the Top Wait Events:
- library cache load lock
- cursor: pin S wait on X
- library cache: mutex X
- library cache lock
- AWR Section "SQL ordered by Version Count" shows high version counts for recursive (system) sqls:
- The reasons for non-sharing of the sql cursor are: OPTIMIZER_MISMATCH and LANGUAGE_MISMATCH
To view full details, sign in with your My Oracle Support account.
Don't have a My Oracle Support account? Click to get started!