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From "Keith Turner (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (ACCUMULO-1062) large numbers of threads make in-memory updates slow
Date Tue, 12 Feb 2013 22:41:15 GMT

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

Keith Turner updated ACCUMULO-1062:
-----------------------------------

    Fix Version/s: 1.4.3
    
> 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, 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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