My Oracle Support Banner

On 12.2, Sessions are Waiting a Long Time with event "enq: UL - Contention" on ctxsys.drvdml.com_sync_index (Doc ID 2481725.1)

Last updated on FEBRUARY 24, 2019

Applies to:

Oracle Text - Version 12.2.0.1 and later
Information in this document applies to any platform.

Symptoms

After upgrading the database to 12.2.0.1 or creating a new 12.2 database, there are lots of sessions waiting a long time with event "enq: UL - contention".

Below is the statement being waited on in those sessions:

begin ctxsys.drvdml.com_sync_index(:idxname, :idxmem, :partname); end;

 

This is evident from an AWR report taken during the time of contention:

 

The issue is happening for context indexes created with SYNC (ON COMMIT).

Changes

 

Cause

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

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


In this Document
Symptoms
Changes
Cause
Solution
References


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