The java heap dumps generated in a Linux Machine (and most probably Unix machines as well) have restricted access. The heap can only be read by the owner of the process (ACL mask is set to 600). I ...

jmap -heap gives me output that says: New Generation Used 100%, Eden Space Used 100%, From Space Used 100%, To Space Used: 0%, Perm Generation Used: 38% Is this 100% of New, Eden, From space - a ...

We have had our glassfish instance go down every two weeks for a while with a java.lang.OutOfMemoryError: PermGen space. I increased the PermGen space to 512MB and startet dumping memory usage with...

I'm using jmap to get a histogram of the heap. I'm not sure what the objects are that are referred to as "[C", "[S", "[I" and "[B". Anyone know? $ jmap -histo 3299 num #instances #bytes cl...

What is difference between 'Shared Object Memory' and 'Heap Memory' in Java. Is it like 'Shared Object Memory' is superset of 'Heap Memory'? The source of this question is documentation of jmap. I...

I've been experimenting with jmap -histo and jmap -dump today When run in this sequence jmap -dump:format=b,file=heap.1 [pid] jmap -dump:live,format=b,file=heap.2 [pid] jmap -dump:format=b,file=h...

Quick question Does the jmap heap dump include only the old generation, or also the young generation ? Long explanation I have 2 heap dump (jmap -heap:format=b 9999) : one of my server with ...

I know that it's possible to dump heap when an OutOfMemoryException is occuring on this JVM but is it possible to ask a live dump with tools like jmap or jconsole?

I would like to find out what is the total heap size that is in use at a certain time by a Java process and I have to use jmap. The output of jmap -heap <pid> gives me something like this: A...

I'm trying to track down a memory leak in a java process, using jmap and jhat. Every time I do this I see those weird notation for specific object types, like [S for string arrays and [C for Charac...