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Posted to common-dev@hadoop.apache.org by "Todd Lipcon (JIRA)" <ji...@apache.org> on 2013/03/20 18:11:15 UTC

[jira] [Created] (HADOOP-9420) Add percentile or max metric for rpcQueueTime, processing time

Todd Lipcon created HADOOP-9420:
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             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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