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: mrv2 Affects Versions: 0.23.1 Reporter: Siddharth Seth 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