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Posted to notifications@accumulo.apache.org by "Keith Turner (JIRA)" <ji...@apache.org> on 2013/02/21 15:52:15 UTC

[jira] [Resolved] (ACCUMULO-1062) large numbers of threads make in-memory updates slow

     [ https://issues.apache.org/jira/browse/ACCUMULO-1062?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Keith Turner resolved ACCUMULO-1062.
------------------------------------

    Resolution: Fixed
      Assignee: Eric Newton  (was: Keith Turner)
    
> large numbers of threads make in-memory updates slow
> ----------------------------------------------------
>
>                 Key: ACCUMULO-1062
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-1062
>             Project: Accumulo
>          Issue Type: Bug
>          Components: tserver
>    Affects Versions: 1.4.2
>         Environment: testing on large clusters
>            Reporter: Eric Newton
>            Assignee: Eric Newton
>            Priority: Critical
>             Fix For: 1.5.0, 1.4.3
>
>         Attachments: SlamTest.java
>
>
> Using hundreds of ingest programs, each running several batch writers, ingest would eventually become slow.  Testing (attached) proved that performance fell off as the number of threads increased.

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