vinothchandar commented on issue #800: Performance tuning URL: https://github.com/apache/incubator-hudi/issues/800#issuecomment-514140879 That job pretty much just writes out parquet (or versions parquet files if you have updates). From what I see a single task is gc-ing for hours even though the input is more or less same (7M records or so). I have seen this (not this bad though) caused on yarn due to interference from other jobs or yarn not blacklisting a bad host.. As a next step, can we try configuring a larger heap (say double it) or obtain a heapdump of such a process and we can see whats going on (i.e if there is a leak)
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