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Posted to issues@hbase.apache.org by "Zheng Hu (JIRA)" <ji...@apache.org> on 2019/05/10 14:46:00 UTC

[jira] [Commented] (HBASE-22387) Evaluate the get/scan performance after reading HFile block into offheap directly

    [ https://issues.apache.org/jira/browse/HBASE-22387?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16837333#comment-16837333 ] 

Zheng Hu commented on HBASE-22387:
----------------------------------

The ByteBuffAllocator#getFreeBufferCount will be O(N) complexity, because the buffers here is an ConcurrentLinkedQueue. It's worth file an issue for this.

> Evaluate the get/scan performance after reading HFile block into offheap directly
> ---------------------------------------------------------------------------------
>
>                 Key: HBASE-22387
>                 URL: https://issues.apache.org/jira/browse/HBASE-22387
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Zheng Hu
>            Assignee: Zheng Hu
>            Priority: Major
>
> Now, all sub-tasks has been resolved now (except the HBASE-21946 because of the hadoop dependency problem), will provide some performance benckmarks to show the latency improvement.



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