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Posted to commits@druid.apache.org by GitBox <gi...@apache.org> on 2018/08/20 16:37:49 UTC

[GitHub] QiuMM opened a new issue #6198: About Direct Memory

QiuMM opened a new issue #6198: About Direct Memory
URL: https://github.com/apache/incubator-druid/issues/6198
 
 
   In current doc, it says the amount of direct memory needed by Druid is at least `druid.processing.buffer.sizeBytes * (druid.processing.numMergeBuffers + druid.processing.numThreads + 1)`. But for realtime and historical nodes they need direct memory for mmap, so the java `MaxDirectMemorySize` should set to more larger than this value. Am I right? Or the memory needed by mmap is already covered by this value.

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