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From "Todd Lipcon (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-3024) Improve performance of stringification in addStoredBlock
Date Tue, 28 Feb 2012 06:01:24 GMT
Improve performance of stringification in addStoredBlock
--------------------------------------------------------

                 Key: HDFS-3024
                 URL: https://issues.apache.org/jira/browse/HDFS-3024
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: name-node
    Affects Versions: 0.23.0
            Reporter: Todd Lipcon
            Assignee: Todd Lipcon
            Priority: Minor


In looking at stack traces of a NN under a heavy block allocation load (around a thousand
per second) I see that a lot of time is being taken up in stringification of log messages
for addStoredBlock. This code can be optimized to use a single StringBuilder instead of a
lot of nested toString() calls.

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