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Posted to issues@hbase.apache.org by "ramkrishna.s.vasudevan (JIRA)" <ji...@apache.org> on 2016/10/21 05:01:05 UTC

[jira] [Updated] (HBASE-16890) Analyze the performance of AsyncWAL and fix the same

     [ https://issues.apache.org/jira/browse/HBASE-16890?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ramkrishna.s.vasudevan updated HBASE-16890:
-------------------------------------------
    Attachment: contention.png
                contention_defaultWAL.png

When we try to load 15G of data but with 50 threads and we do a profile for 1 min. We could see that in AsyncWAL case we have contention in the 'waitingConsumePayloads' ArrayDeque. But in the default case there is not much contention as you can see in the snapshots attached. 

> Analyze the performance of AsyncWAL and fix the same
> ----------------------------------------------------
>
>                 Key: HBASE-16890
>                 URL: https://issues.apache.org/jira/browse/HBASE-16890
>             Project: HBase
>          Issue Type: Sub-task
>          Components: wal
>    Affects Versions: 2.0.0
>            Reporter: ramkrishna.s.vasudevan
>            Assignee: ramkrishna.s.vasudevan
>             Fix For: 2.0.0
>
>         Attachments: contention.png, contention_defaultWAL.png
>
>
> Tests reveal that AsyncWAL under load in single node cluster performs slower than the Default WAL. This task is to analyze and see if we could fix it.
> See some discussions in the tail of JIRA HBASE-15536.



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