Memory needed for opening heap dumps .hprof

Question

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.

score 1 · Accepted Answer · answered Apr 07 '17 at 09:42

1

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.

answered Apr 07 '17 at 09:42

Tomas Hurka

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Any references ? – Sachin Verma Apr 08 '17 at 15:27
References to what? – Tomas Hurka Apr 10 '17 at 13:42

Memory needed for opening heap dumps .hprof

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