Eclipse Memory Analyzer 内存分析器

source: http://blog.seancassidy.me/better-java.html

 

Memory leaks happen, even in Java. Luckily, there are tools for that. The best tool I've used to fix these is the Eclipse Memory Analyzer. It takes a heap dump and lets you find the problem.

There's a few ways to get a heap dump for a JVM process, but I use jmap:

$ jmap -dump:live,format=b,file=heapdump.hprof -F 8152
Attaching to process ID 8152, please wait...
Debugger attached successfully.
Server compiler detected.
JVM version is 23.25-b01
Dumping heap to heapdump.hprof ...
... snip ...
Heap dump file created

Then you can open the heapdump.hprof file with the Memory Analyzer and see what's going on fast.