[jboss-user] [Performance Tuning] - VisualVM
do-not-reply at jboss.com
Fri Sep 5 14:41:14 EDT 2008
Just a word of warning. I was playing around with VisualVM. I connected it to a running instance of JBossAS 5.0.0.CR1 that was not doing anything. Suddenly, the app server became active. The CPU usage was still relatively low, but every 20 seconds I was getting a garbage collection.
Apparently, just connecting VisualVM to a Java app causes objects and garbage to be created.
I checked JConsole and it does not exhibit this behavior.
This behavior makes VisualVM a poor choice for monitor Java applications in production.
By the way, I was using the VisualVM from JDK 6u7, and I ran AS 5.0.0.CR1 on the same version.
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