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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14922) Delayed flush doesn't work causing flush storms.
Date Thu, 03 Dec 2015 22:15:11 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14922?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15038705#comment-15038705

stack commented on HBASE-14922:

Fix this on commit:

  * @param jitter Should the

So, by default, all chores get jitter now? That is probably good thing but you checked all
chores we currently run to make sure none time-sensitive (yeah, if its a 'chore', by definition,
it should not be but hey...)

Otherwise, +1.

> Delayed flush doesn't work causing flush storms.
> ------------------------------------------------
>                 Key: HBASE-14922
>                 URL: https://issues.apache.org/jira/browse/HBASE-14922
>             Project: HBase
>          Issue Type: Bug
>          Components: regionserver
>    Affects Versions: 2.0.0, 1.2.0, 1.1.2
>            Reporter: Elliott Clark
>            Assignee: Elliott Clark
>             Fix For: 2.0.0, 1.2.0, 1.3.0
>         Attachments: HBASE-14922-v1.patch, HBASE-14922.patch
> Starting all regionservers at the same time will mean that most PeriodicMemstoreFlusher's
will be running at the same time. So all of these threads will queue flushes at about the
same time.
> This was supposed to be mitigated by Delayed. However that isn't nearly enough. This
results in the immediate filling up and then draining of the flush queues every hour.

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