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javamemoryheap-memoryvisualvmhprof
Sachin Verma
Sachin Verma

Reputation: 3802

Memory needed for opening heap dumps .hprof

If I use any Java application like VisualVM to open a heap dump (hprof file), would I need more heap memory for VisualVM than hprof file size?

In my case, hprof is 4Gb file and VisualVM has 2 GB Heap size and it's fails to properly load HPROF file.

Upvotes: 0

Views: 418

Answers (1)

Tomas Hurka
Tomas Hurka

Reputation: 6981

You don't need more heap memory for VisualVM than hprof file size. VisualVM does not load heap dump into JDK heap. It uses memory-mapped files instead. This way it can use a lot of memory even if the default Xmx for VisualVM is 256M.

Upvotes: 1

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