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From "Eric Newton (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (ACCUMULO-49) optionally monitor swappiness on every server
Date Wed, 02 May 2012 14:06:51 GMT

     [ https://issues.apache.org/jira/browse/ACCUMULO-49?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Eric Newton updated ACCUMULO-49:
--------------------------------

    Fix Version/s: 1.4.1
    
> optionally monitor swappiness on every server
> ---------------------------------------------
>
>                 Key: ACCUMULO-49
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-49
>             Project: Accumulo
>          Issue Type: New Feature
>          Components: logger, master, trace, tserver
>         Environment: idle tablet server is swapped out on an otherwise busy system
>            Reporter: Eric Newton
>            Assignee: Eric Newton
>            Priority: Minor
>             Fix For: 1.5.0, 1.4.1
>
>   Original Estimate: 4h
>  Remaining Estimate: 4h
>
> Linux kernel will eagerly swap idle memory (such as the tablet server) for disk cache
unless the /proc/sys/vm/swappiness setting is set to 0. A swapped-out server is sluggish enough
that it loses its zookeeper lock.

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