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Hudson commented on MAPREDUCE-3511: ----------------------------------- Integrated in Hadoop-Hdfs-0.23-Build #134 (See [https://builds.apache.org/job/Hadoop-Hdfs-0.23-Build/134/]) MAPREDUCE-3511. Removed a multitude of cloned/duplicate counters in the AM thereby reducing the AM heap size and preventing full GCs. (vinodkv) svn merge -c 1229347 trunk vinodkv : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1229350 Files : * /hadoop/common/branches/branch-0.23 * /hadoop/common/branches/branch-0.23/hadoop-common-project * /hadoop/common/branches/branch-0.23/hadoop-common-project/hadoop-auth * /hadoop/common/branches/branch-0.23/hadoop-common-project/hadoop-common * /hadoop/common/branches/branch-0.23/hadoop-common-project/hadoop-common/CHANGES.txt * /hadoop/common/branches/branch-0.23/hadoop-common-project/hadoop-common/src/main/docs * /hadoop/common/branches/branch-0.23/hadoop-common-project/hadoop-common/src/main/java * /hadoop/common/branches/branch-0.23/hadoop-common-project/hadoop-common/src/test/core * /hadoop/common/branches/branch-0.23/hadoop-hdfs-project/hadoop-hdfs * /hadoop/common/branches/branch-0.23/hadoop-hdfs-project/hadoop-hdfs/src/main/java * /hadoop/common/branches/branch-0.23/hadoop-hdfs-project/hadoop-hdfs/src/main/native * 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/hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/src/test/mapred/org/apache/hadoop/ipc * /hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/src/test/mapred/org/apache/hadoop/security/authorize/TestServiceLevelAuthorization.java * /hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/src/test/mapred/org/apache/hadoop/test/MapredTestDriver.java * /hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/src/webapps/job * /hadoop/common/branches/branch-0.23/hadoop-project * /hadoop/common/branches/branch-0.23/hadoop-project/src/site > Counters occupy a good part of AM heap > -------------------------------------- > > Key: MAPREDUCE-3511 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-3511 > Project: Hadoop Map/Reduce > Issue Type: Sub-task > Components: mr-am, mrv2 > Affects Versions: 0.23.0 > Reporter: Siddharth Seth > Assignee: Vinod Kumar Vavilapalli > Priority: Blocker > Fix For: 0.23.1 > > Attachments: MAPREDUCE-3511-20120107.1.txt, > MAPREDUCE-3511-20120109.txt > > > Per task counters seem to be occupying a good part of an AMs heap. Looks like > more than 50% of what's used by a TaskAttemptImpl object. > This could be optimized by interning strings or possibly using mrv1 counters > which are optimized. Currently counters are converted from mrv1 to mrv2 > format for in memory storage. The conversion could be delayed till it's > actually required for RPC transfers. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira