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From "Eric Newton (JIRA)" <>
Subject [jira] [Created] (ACCUMULO-1062) large numbers of threads make in-memory updates slow
Date Tue, 12 Feb 2013 22:31:13 GMT
Eric Newton created ACCUMULO-1062:

             Summary: large numbers of threads make in-memory updates slow
                 Key: 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

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

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