补充一个,当我把state.backend.rocksdb.writebuffer.count: 48调小到10的话,

jstack来看,从https://spotify.github.io/threaddump-analyzer/分析来看

top类的方法基本都在rocksdb的io上了。并且很多线程都在等待
<http://apache-flink.147419.n8.nabble.com/file/t670/stack.png> 

<http://apache-flink.147419.n8.nabble.com/file/t670/sleep.png> 





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