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Posted to commits@pulsar.apache.org by GitBox <gi...@apache.org> on 2022/03/24 03:34:56 UTC

[GitHub] [pulsar] dao-jun removed a comment on issue #14705: what is the mean skipListArenaChunkSize,skipListArenaMaxAllocSize,skipListSizeLimit

dao-jun removed a comment on issue #14705:
URL: https://github.com/apache/pulsar/issues/14705#issuecomment-1077033607


   In my understanding:
   
   skipListSizeLimit: It means how many entries can be added in a `EntryMemTable`
   
   skipListArenaChunkSize: It means the memory size of a `Chunk`(a heap memory pool, to avoid frequently memory allocation and a lot of memory fragments). When bookie received an entry, the entry exists in `direct memory`, so that it needs to copy into heap memory(Chunk).
   
   skipListArenaMaxAllocSize: It means the threshold of an entry can be copy into `Chunk`. If an entry's size is greater than `skipListArenaMaxAllocSize`,  bookie will be allocated heap memory by invoke `new byte[size]` directly.


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