My Oracle Support Banner

High Version Count with CURSOR_SHARING = SIMILAR or FORCE (Doc ID 261020.1)

Last updated on FEBRUARY 14, 2019

Applies to:

Oracle Database - Enterprise Edition - Version and later
Oracle Database - Personal Edition - Version and later
Oracle Database - Standard Edition - Version and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.



High version counts can easily cause high contention for library cache latches. A process parsing a SQL statement with many versions (children cursors) will need to scan
through all these children while holding on to a library cache latch.  This means that other processes needing the same latch will have to wait and can lead to significant database-wide performance degradation.


CURSOR_SHARING has been changed to SIMILAR or FORCE.


To view full details, sign in with your My Oracle Support account.

Don't have a My Oracle Support account? Click to get started!

My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.