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From "Liang Xie (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-10010) eliminate the put latency spike on the new log file beginning
Date Mon, 25 Nov 2013 06:49:37 GMT

    [ https://issues.apache.org/jira/browse/HBASE-10010?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13831209#comment-13831209

Liang Xie commented on HBASE-10010:

yes, it's absolutely a different issue. you can add some logging statement to record the first
sync() invoke in syncer(long txid) with a flag variable, it's not difficult to observe the
long latency, e.g. 20 or 30ms.

> eliminate the put latency spike on the new log file beginning
> -------------------------------------------------------------
>                 Key: HBASE-10010
>                 URL: https://issues.apache.org/jira/browse/HBASE-10010
>             Project: HBase
>          Issue Type: Improvement
>          Components: regionserver
>    Affects Versions: 0.94.13
>            Reporter: Liang Xie
>            Assignee: Liang Xie
>         Attachments: HBase-10010-0.94-v2.txt, HBase-10010-0.94-v3.txt, HBase-10010-0.94.txt,
HBase-10010-trunk-v2.txt, HBase-10010-trunk.txt
> In deed, the original finding came from fb, see HBASE-6813 for detailed discussion.
> Through this improvement doesn't expect obvious gain on 95th or 99th latency, it still
could make the response time more stable to me.

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