MAT Java 内存分析工具

当前 MAT 可以分析 HPROF 二进制(produced by Sun, HP, SAP, etc… JVMs) 和 IBM system dumps (after preprocessing them), 以及 IBM portable heap dumps (PHD) .

find the biggest objects, as MAT provides reasonable accumulated size (retained size)
explore the object graph, both inbound and outbound references
compute paths from the garbage collector roots to interesting objects
find memory waste, like redundant String objects, empty collection objects, etc...

note: 从JDK 6 update 14 and above, HPROF 里面也包含所有线程的 callstatck.
参考: Heap Dump Analysis with Memory Analyzer, Part 1: Heap Dumps