Is it possible to check heap memory usage by pool?

Question

I've been working on optimizing a program that was having a lot of issues with memory leaks. The leaks are gone now, but the occasional runs of the major GC still put a good dent in PS old gen. I know that I can check basic overall memory information through Runtime, but is it possible to check usage in PS eden, PS survivor, and PS old from within the program?

Answer 1

This article can help you out

You can write custom code to analyze memory & output will be in the form

collection time: 82037
collection count: 116
PS Survivor Space: init = 1703936(1664K) used = 65536(64K) committed = 32047104(31296K) max = 32047104(31296K)
PS Eden Space: init = 10551296(10304K) used = 0(0K) committed = 69795840(68160K) max = 113049600(110400K)
PS Old Gen: init = 27983872(27328K) used = 239432344(233820K) committed = 357957632(349568K) max = 357957632(349568K)
Code Cache: init = 2555904(2496K) used = 19949568(19482K) committed = 20185088(19712K) max = 50331648(49152K)
PS Perm Gen: init = 21757952(21248K) used = 148450536(144971K) committed = 155058176(151424K) max = 268435456(262144K)

Good read