Tomcat Server Maximum Heap size (-Xmx Value ) is changed while Tomcat is Running?

Initially, my Tomcat is Started wit hsome Xmx Value. But it is changing with in 5 mins. But My Tomcat is 开发者_StackOverflow社区running with heavy Load.? Is it possible OS can reduce/ increase Xmx Value dynamically?

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Your -Xmx, your MAX heap will not grow. Your CURRENT heap may grow.

For example...

You start with a -Xmx of 1g.

App starts with a heap of 256m. It may slowly grow (depending on load etc.) to 1g, but it should never pass 1g. If it needs more than 1g of memory it will crash.

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Is it possible OS can reduce/ increase Xmx Value dynamically?

No

OS is not the problem, probably is your app as BalusC suggested