Heap size

[newbiejava]

Dear The Expert,

is there any formula to calculate required heap size?
and
is there any method to refresh JVM after took long time processing? or any JVM fine tuning method?

please advise

thanks & regards

[Eranga]

What you mean required heap size? You can find the available heap size and based on it you may take some decisions. But it should not be so critical stuff. And also you can find maximum and free memory at that time.

Runtime.getRuntime().totalMemory(); 

Runtime.getRuntime().maxMemory(); 

Runtime.getRuntime().freeMemory();

[Eranga]

If you can clear-up what you exactly want to do it's much easier to comment. And also please note that check the spellings on above three line of code, I just wrote them in the forum editor...