Downloadable files
Abstract
PMI statistics are enabled by default for an Application Server and when enabled, a gradual degradation in performance might be observed.
Download Description
PK64697 resolves the following problem:
ERROR DESCRIPTION:
On tests with Performance Monitoring Infrastructure (PMI) activated, there is a decrease in IBM® WebSphere® Portal throughput over time as measured by the Loadrunner controller. Without PMI, no such decrease is observed.
LOCAL FIX:
Turn off PMI stats.
PROBLEM SUMMARY
USERS AFFECTED:
IBM® WebSphere® Application Server Version 6.1 users with Performance Monitoring Infrastructure (PMI) statistics enabled.
PROBLEM DESCRIPTION:
PMI statistics are enabled by default for an Application Server and when enabled, a gradual degradation in performance might be observed. This can lead to a denial of service.
RECOMMENDATION:
None
When PMI statistics are enabled, irrespective of whether individual statistics are enabled or disabled, sufficient memory can be consumed to cause a gradual degradation in performance over time.
PROBLEM CONCLUSION:
Relevant individual PMI statistics have been modified to no longer consume memory when disabled and further have been moved from the "basic" set of PMI Statistics to the "all" set so that they are not enabled by default.
Note that if a "custom" PMI statistics set is in use the enablement/disablement of individual stats is unaffected by this APAR.
This APAR affects the granularity with which some PMI statistics can be enabled at runtime. To undo the effects of this APAR and return to the previous behavior, after applying this APAR please set the Webcontainer custom property com.ibm.ws.webcontainer.RuntimeURIStatEnablement to true.
The fix for this APAR is currently targeted for inclusion in Fix Pack 6.1.0.19.
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.
| URL | LANGUAGE | SIZE(Bytes) |
|---|---|---|
| UpdateInstaller | US English | 7250000 |
Installation Instructions
Please review the readme.txt for detailed installation instructions.
| URL | LANGUAGE | SIZE(Bytes) |
|---|---|---|
| Readme | US English | 5603 |
Download package
| Download | RELEASE DATE | LANGUAGE | SIZE(Bytes) | Download Options What is Fix Central (FC)? What is DD? |
|---|---|---|---|---|
| 6.1.0-WS-WAS-IFPK64697 | 5/20/2008 | US English | 16842 | FC FTP DD |
Technical support
Contact IBM Support using SR (http://www-306.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).
Problems (APARS) fixed
Rate this page:
Copyright and trademark information
IBM, the IBM logo and ibm.com are trademarks of International Business Machines Corp., registered in many jurisdictions worldwide. Other product and service names might be trademarks of IBM or other companies. A current list of IBM trademarks is available on the Web at "Copyright and trademark information" at www.ibm.com/legal/copytrade.shtml.