# 1.问题排查

## BTrace 系

- [btrace](https://github.com/btraceio/btrace)
- [greys](https://github.com/oldmanpushcart/greys-anatomy) 交互式免脚本，比btrace更易用

[Java神器Btrace，从入门到熟练小工手册](https://mp.weixin.qq.com/s/4bZ6iSvpqPsjdvkSoFVhrg)

## 在线日志分析

- [easygc.io](http://www.gceasy.io/) gc日志分析
- [fastthread.io](http://fastthread.io/) thread dump分析

## HeapDump分析

- [Eclipse MAT](https://www.eclipse.org/mat/)

# 2.性能Profile

- [Java Mission Control](http://www.oracle.com/technetwork/java/javaseproducts/mission-control/index.html) JDK自带Profiler
- [async-profiler](https://github.com/jvm-profiling-tools/async-profiler) 火焰图生成工具