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Arun C Murthy commented on MAPREDUCE-3511: ------------------------------------------ We could adopt similar 'enums' for MRv2 counters for the framework ones, no? > 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: Bug > Components: mr-am, mrv2 > Affects Versions: 0.23.0 > Reporter: Siddharth Seth > Assignee: Devaraj K > > 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