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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