[ https://issues.apache.org/jira/browse/MAPREDUCE-3567?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13174500#comment-13174500 ]
Siddharth Seth commented on MAPREDUCE-3567: ------------------------------------------- +1. Patch looks good, except for the extra javac warnings. > Extraneous JobConf objects in AM heap > ------------------------------------- > > Key: MAPREDUCE-3567 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-3567 > Project: Hadoop Map/Reduce > Issue Type: Sub-task > Components: mr-am, mrv2, performance > Affects Versions: 0.23.0 > Reporter: Vinod Kumar Vavilapalli > Assignee: Vinod Kumar Vavilapalli > Fix For: 0.23.1 > > Attachments: MAPREDUCE-3567-20111215.1.txt > > > MR AM creates new JobConf objects unnecessarily in a couple of places in > JobImpl and TaskImpl which occupy non-trivial amount of heap. > While working with a 64 bit JVM on 100K maps jobs, with uncompressed > pointers, removing those extraneous objects helped in addressing OOM with 2GB > AM heap size. -- 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