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Asked: 2026-06-17T08:06:24+00:00

What are the necessary steps in getting a optimized value of Xms/Xmx/XX:MaxPermSize ? Definitely

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What are the necessary steps in getting a optimized value of Xms/Xmx/XX:MaxPermSize?

Definitely I can set a large value but as you know GC take time in large memory. What are the general recommendation when I can spare the time in testing and finding these value?

For example, is the following figures help?

Eden Space heap usage - 42MB / 62MB (used / committed)
Survivor Space heap usage - 8.5MB / 8.5MB (used / committed)
CMS Old Gen heap usage - 100MB / 217MB  (used / committed)
Non-heap memory pool usage - 36MB
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  1. Editorial Team

    The general rule is that you should not change the JVM memory settings before you have discovered a problem that need to be solved. The JVM does a pretty good job in tuning most parameters in runtime to suit your application.

    If you have discovered a need to optimize the memory parameters it depends on what you need to optimize. The settings you would use would vary greatly depending on which aspect you need to optimize (for example settings for minimizing pauses are very different from settings that maximize throughput).

    If you really do need to optimize, please provide more information on what aspect you need to optimize.

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