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From "Elliott Clark (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-14922) Delayed flush doesn't work causing flush storms.
Date Thu, 03 Dec 2015 18:49:11 GMT

     [ https://issues.apache.org/jira/browse/HBASE-14922?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Elliott Clark updated HBASE-14922:
----------------------------------
    Description: 
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.

  was:
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 used at all. This results
in the immediate filling up and then draining of the flush queues every hour.


> 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
>            Reporter: Elliott Clark
>            Assignee: Elliott Clark
>
> 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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