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Improving Performance of OSM by increasing PCTFREE (Doc ID 2240041.1)

Last updated on DECEMBER 05, 2019

Applies to:

Oracle Communications Order and Service Management - Version 7.2.0 to [Release 7.2 to 7.3.0]
Information in this document applies to any platform.


This document explains how to change the PCTFREE on an OSM Database to increase the performance.

The performance of some inserts statements in OSM can be improved by reducing the index concurrency by increasing the PCTFREE. The reason for the index concurrency is frequent block splits when inserting new rows into the index. When inserting a new row into an index the session needs to find space in an index block, if it can't find space it will initiate an index block split which can result in concurrency.


 This document is applicable to OSM 7.2.x to 7.3.1.x.


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In this Document
 Changing the Default Index PCTFREE for New Partitions Added in the Future
 Changing the Index PCTFREE for ACTIVE and AVAILABLE (Empty) Partitions
 Checking the index PCTFREE on Existing Partitions

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