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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-18559) Add histogram to MetricsConnection to track concurrent calls per server
Date Fri, 06 Oct 2017 19:26:05 GMT

    [ https://issues.apache.org/jira/browse/HBASE-18559?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16195108#comment-16195108

Hudson commented on HBASE-18559:

Results for branch HBASE-18467, done in 4 hr 24 min and counting
	[build #136 on builds.a.o|https://builds.apache.org/job/HBase%20Nightly/job/HBASE-18467/136/]:
details (if available):

(x) *{color:red}-1 overall{color}*
    Committer, please check your recent inclusion of a patch for this issue.

(x) {color:red}-1 general checks{color}
-- For more information [see general report|https://builds.apache.org/job/HBase%20Nightly/job/HBASE-18467/136//General_Nightly_Build_Report/]

(/) {color:green}+1 jdk8 checks{color}
-- For more information [see jdk8 report|https://builds.apache.org/job/HBase%20Nightly/job/HBASE-18467/136//JDK8_Nightly_Build_Report/]

(x) {color:red}-1 source release artifact{color}
-- See build output for details.

> Add histogram to MetricsConnection to track concurrent calls per server
> -----------------------------------------------------------------------
>                 Key: HBASE-18559
>                 URL: https://issues.apache.org/jira/browse/HBASE-18559
>             Project: HBase
>          Issue Type: Improvement
>          Components: Client
>            Reporter: Robert Yokota
>            Assignee: Robert Yokota
>            Priority: Minor
>             Fix For: 2.0.0, 3.0.0, 1.4.0, 1.5.0
>         Attachments: HBASE-18559.master.001.patch
> HBASE-16388 introduced a new configuration setting "hbase.client.perserver.requests.threshold
" to deal with slow region servers.   I have back-ported the code for the new config setting
to our environment, but I don't feel comfortable setting it in production without visibility
into how the number of concurrent calls per server varies (especially the current high water
mark or max in production when the cluster is healthy).  
> It is straightforward to pass the value for the concurrent calls per server to a new
histogram in MetricsConnection.  I will attach a patch that I am using to gain a better understanding
of how setting "hbase.client.perserver.requests.threshold" will affect our production environment.

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