[
https://issues.apache.org/jira/browse/MAPREDUCE-4229?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13269428#comment-13269428
]
Harsh J commented on MAPREDUCE-4229:
------------------------------------
Sounds similar in approach to HDFS-1110, which was done for filenames on DFS.
> Intern counter names in the JT
> ------------------------------
>
> Key: MAPREDUCE-4229
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4229
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: jobtracker
> Affects Versions: 1.0.2
> Reporter: Todd Lipcon
>
> In our experience, most of the memory in production JTs goes to storing
> counter names (String objects and character arrays). Since most counter names
> are reused again and again, it would be a big memory savings to keep a hash
> set of already-used counter names within a job, and refer to the same object
> from all tasks.
--
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
