Parallel and Serial Text SYNC_INDEX is Slow when SUBSTRING_INDEX is Enabled (Doc ID 840097.1)

Last updated on MAY 13, 2013

Applies to:

Oracle Text - Version 10.2.0.3 to 11.2.0.1 [Release 10.2 to 11.2]
Information in this document applies to any platform.
***Checked for relevance on 07-Sep-2012***

Symptoms

Slow performance when performing serial or parallel index synchronization on a index with substring_index enabled.
Most of the time is spent in populating the $I table and the $P table via the trigger on $I.
For parallel synchronize, if one parallel slave inserts a token and another parallel slave is blocked from inserting the same token with TX lock, the second parallel slave is also blocked from doing further $I inserts as well.

Cause

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 hundreds of Community platforms