IBM Support

PI36346;8.5.5: performance issue with certain object model operations

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Abstract

Certain operations on a copied object graph were causing it to be fully materialized.

Download Description

PI36346 resolves the following problem:


ERROR DESCRIPTION:
Additional materialization of a tree that contains both the original and the copied node affects performance.

LOCAL FIX:

PROBLEM SUMMARY

USERS AFFECTED:
All users of IBM WebSphere Application Server

PROBLEM DESCRIPTION:
Certain operations on a copied object graph were causing it to be fully materialized.

RECOMMENDATION:
None

When a copied node and it's original node are in the same object graph, operations such as copying or moving nodes would trigger some part of the object graph to be fully materialized. Depending on the size of the materialized portion, this might affect performance.

PROBLEM CONCLUSION:
Some optimizations are now in place that avoid a full materialization of a copied object graph during certain operations. This materialization is delayed until it reaches a scenario where it is actually needed.

The fix for this APAR is currently targeted for inclusion in
fix pack 8.5.5.6. Please refer to the Recommended Updates page for delivery information:
http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980

Prerequisites

None

Installation Instructions

Please review the readme.txt for detailed installation instructions.

[{"INLabel":"Readme","INLang":"US English","INSize":"3336","INURL":"ftp://public.dhe.ibm.com/software/websphere/appserv/support/fixes/PI36346/8.5.5.5/readme.txt"}]
On
[{"DNLabel":"8.5.5.5-WS-WASProd-IFPI36346","DNDate":"03-12-2015","DNLang":"US English","DNSize":"391007","DNPlat":{"label":"AIX","code":"PF002"},"DNURL":"http://www-933.ibm.com/eserver/support/fixes/fixcentral/swgquickorder?fixes=8.5.5.5-WS-WASProd-IFPI36346&productid=WebSphere%20Application%20Server&brandid=5","DNURL_FTP":null,"DDURL":null}]

Technical Support

Contact IBM Support using SR (http://www.ibm.com/software/support/probsub.html), visit the WebSphere Application Server support web site (http://www.ibm.com/software/webservers/appserv/was/support/), or contact 1-800-IBM-SERV (U.S. only).

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Document Information

Modified date:
15 June 2018

UID

swg24039582

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