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Editorial Team
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Asked: 2026-06-08T13:45:17+00:00

We have created a spring web app. using: Spring 3.1.0 Hibernate 3.5.4 final tomcat

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We have created a spring web app. using:

  • Spring 3.1.0
  • Hibernate 3.5.4 final
  • tomcat 6.24

The application is reasonably heavy, we are sending about 1000 contacts per user request.
We tested our application with 9 concurrent users with repeated requests and profiled with visual vm the results are as follows:

enter image description here

Looking at the results, the high peaks are the repeated requests and the lower points are when all requests are stopped. The first ~200MB of memory does not seem to be released at all. Is spring actually just this heavy or do I have a potential memory issue? The release version of this web app will potentially handle much more users.

I have similar results testing on tomcat 7 as well.

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  1. Editorial Team

    its not any memory issue, GC is smart enough that release objects after there is no reference in your application, make sure that there is no global reference for which can be used as local to any method, and as per your graph it is releasing objects, 200 mb may be required tor permgen, so you should not worry.

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