Archive for November, 2009
Sunday, November 29th, 2009
In WebSphere (should be similar in other app server), follow listed steps to enable jcc tracing: 1. Select the data source that uses the Universal Driver from the WebSphere administrative console. 2. Click Custom Properties on the data source configuration screen. 3. Enter value -1 (TRACE_ALL) for the ...
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Friday, November 20th, 2009
Generate heap dumps for IBM WebSphere
You can always generate JVM heap dumps manually by setting the following environment variables in the shell in where a JVM starts.
IBM_HEAPDUMP=true heap dump in .phd format used for newer memory tools
IBM_JAVA_HEAPDUMP_TEXT=true classic heap dump format for older ...
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Monday, November 16th, 2009
You can leverage more CPUs to run iozone on a SMP machine with thefollowing instructions:The -P option of iozone sets the processor that will be used for the test.The & at the end of the command detaches the process so all the commands will run at the sametime.The -f option ...
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Tuesday, November 10th, 2009
Take the following steps to make IOZone (IO test tool) to work on AIX 6.11) Install and setup the build treerpm -ivv iozone-3.291-1.src.rpm2) Soft link xlc, IBM xlc must be installed (use lslpp to check)ln -s /usr/vac/bin/cc /usr/bin/cc3) Execute the buildcd /opt/freeware/src/packages/SPECSrpm -ba iozone-3-291-1.spec4) Execute the newly created install rpm ...
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