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Posted to notifications@accumulo.apache.org by "Eric Newton (JIRA)" <ji...@apache.org> on 2013/02/12 23:33:12 UTC

[jira] [Updated] (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 ]

Eric Newton updated ACCUMULO-1062:
----------------------------------

    Attachment: SlamTest.java
    
> 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: Keith Turner
>            Priority: Critical
>             Fix For: 1.5.0
>
>         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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