High Waits for 'latch: library cache' when Querying V$SESSION / V$ACCESS with Full Table Scan on X$KGLDP
(Doc ID 860915.1)
Last updated on FEBRUARY 20, 2019
Applies to:Oracle Database - Enterprise Edition - Version 10.2.0.3 to 184.108.40.206 [Release 10.2 to 11.2]
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.
- High Library cache waits (waits for 'latch: library cache') when querying v$session and v$access.
- Excessive time spent on scan of the X$KGLDP fixed table can cause very long latch hold times of library cache latch causing an instance wide hang.
- For example:
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