Zhe Zhang created HADOOP-13747: ---------------------------------- Summary: Use LongAdder for more efficient metrics tracking Key: HADOOP-13747 URL: https://issues.apache.org/jira/browse/HADOOP-13747 Project: Hadoop Common Issue Type: Improvement Components: metrics Reporter: Zhe Zhang Assignee: Erik Krogen
Currently most metrics, including {{RpcMetrics}} and {{RpcDetailedMetrics}}, use a synchronized counter to be updated by all handler threads (multiple hundreds in large production clusters). As [~andrew.wang] suggested, it'd be more efficient to use the [LongAdder | http://gee.cs.oswego.edu/cgi-bin/viewcvs.cgi/jsr166/src/jsr166e/LongAdder.java?view=co] library which dynamically create intermediate-result variables. Assigning to [~xkrogen] who has already done some investigation on this. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: common-dev-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-dev-h...@hadoop.apache.org