You are viewing a plain text version of this content. The canonical link for it is here.

Posted to common-issues@hadoop.apache.org by "Liang Xie (JIRA)" <ji...@apache.org> on 2014/01/06 08:34:51 UTC

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

     [ https://issues.apache.org/jira/browse/HADOOP-9420?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Liang Xie updated HADOOP-9420:
------------------------------

    Attachment: HADOOP-9420.txt

Attached a minor patch, we should be able to get the 50/75/90/95/99th percentile latency for rpc queue/processing time.
I didn't make a new test case for it, since it's really a small change, right? :)

> 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
>            Assignee: Andrew Wang
>         Attachments: HADOOP-9420.txt
>
>
> 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.



--
This message was sent by Atlassian JIRA
(v6.1.5#6160)