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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-9420) Add percentile or max metric for rpcQueueTime, processing time
Date Wed, 20 Mar 2013 17:11:15 GMT
Todd Lipcon created HADOOP-9420:
-----------------------------------

             Summary: Add percentile or max metric for rpcQueueTime, processing time
                 Key: HADOOP-9420
                 URL: https://issues.apache.org/jira/browse/HADOOP-9420
             Project: Hadoop Common
          Issue Type: Bug
          Components: ipc, metrics
    Affects Versions: 2.0.3-alpha
            Reporter: Todd Lipcon


Currently, we only export averages for rpcQueueTime and rpcProcessingTime. These metrics are
most useful when looking at timeouts and slow responses, which in my experience are often
caused by momentary spikes in load, which won't show up in averages over the 15+ second time
intervals often used by metrics systems. We should collect at least the max queuetime and
processing time over each interval, or the percentiles if it's not too expensive.

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