IBM User Guide for Java V7 on Windows > Troubleshooting and support > Using diagnostic tools
Using Heapdump
The term Heapdump describes the IBM Virtual Machine for Java mechanism that generates a dump of all the live objects that are on the Java heap; that is, those that are being used by the running Java application.
This dump is stored in a Portable Heap Dump (PHD) file, a compressed binary format. You can use various tools on the Heapdump output to analyze the composition of the objects on the heap and (for example) help to find the objects that are controlling large amounts of memory on the Java heap and the reason why the Garbage Collector cannot collect them.
See
- Getting Heapdumps
- Available tools for processing Heapdumps
- Using -Xverbose:gc to obtain heap information
- Environment variables and Heapdump
- Text (classic) Heapdump file format
- Portable Heap Dump (PHD) file format
Parent: Using diagnostic tools
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