IBM Support

PM08491; 7.0.0.17: Performance of outbound channels on udp channel framework

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Abstract

The UDP Channel runs inefficiently when multiple threads are used to process UDP packets.

Download Description

PM08491 resolves the following problem:

ERROR DESCRIPTION:?
The Sametime AV Packet Switcher is using the WebSphere Application Server UDP channel framework as transport for receiving and sending data out. When sending out packets the CPU is getting exhausted because it is spending time in the monitors.

LOCAL FIX:?
none

PROBLEM SUMMARY:?

USERS AFFECTED:
All users of UDP Channel in the IBM WebSphere Application Server V7.0 and v8.0

PROBLEM DESCRIPTION:
The UDP Channel runs inefficiently when multiple threads are used to process UDP packets.

RECOMMENDATION:
None

Thread synchronization issues in the UDP Channel were causing performance issues.

PROBLEM CONCLUSION:?
Removed some of the synchronization points in the code to allow multiple threads to run concurrently.

The fix for this APAR is currently targeted for inclusion in fix packs 7.0.0.19 and 8.0.0.1. Please refer to the Recommended Updates page for delivery information:
http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980

Prerequisites

Please download the UpdateInstaller below to install this fix.

[{"PRLabel":"UpdateInstaller","PRLang":"US English","PRSize":"7250000","PRPlat":{"label":"AIX","code":"PF002"},"PRURL":"http://www.ibm.com/support/docview.wss?rs=180&uid=swg21205991"}]

Installation Instructions

Please review the readme.txt for detailed installation instructions.

[{"INLabel":"Readme","INLang":"US English","INSize":"6053","INURL":"ftp://public.dhe.ibm.com/software/websphere/appserv/support/fixes/PM08491/readme.txt"}]
On
[{"DNLabel":"7.0.0.15-WS-WAS-MultiOS-IFPM08491","DNDate":"03 Jun 2011","DNLang":"US English","DNSize":"30852","DNPlat":{"label":"AIX","code":"PF002"},"DNURL":"http://www.ibm.com/support/fixcentral/quickorder?fixids=7.0.0.15-WS-WAS-MultiOS-IFPM08491&product=ibm%2FWebSphere%2FWebSphere+Application+Server&source=dbluesearch","DNURL_FTP":" ","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).

[{"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Component":"General","Platform":[{"code":"PF002","label":"AIX"},{"code":"PF010","label":"HP-UX"},{"code":"PF012","label":"IBM i"},{"code":"PF016","label":"Linux"},{"code":"PF027","label":"Solaris"},{"code":"PF033","label":"Windows"}],"Version":"7.0.0.15;7.0.0.17","Edition":"Network Deployment;Single Server","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
15 June 2018

UID

swg24031976

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