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From "Myroslav Papirkovskyy (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMBARI-3017) Service metrics call latency increases by a factor of 2 or 3 every 20-30 calls.
Date Thu, 07 Nov 2013 17:15:17 GMT

    [ https://issues.apache.org/jira/browse/AMBARI-3017?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13816137#comment-13816137
] 

Myroslav Papirkovskyy commented on AMBARI-3017:
-----------------------------------------------

Committed to trunk.

> Service metrics call latency increases by a factor of 2 or 3 every 20-30 calls.
> -------------------------------------------------------------------------------
>
>                 Key: AMBARI-3017
>                 URL: https://issues.apache.org/jira/browse/AMBARI-3017
>             Project: Ambari
>          Issue Type: Bug
>          Components: client
>    Affects Versions: 1.4.0
>            Reporter: Srimanth Gunturi
>              Labels: performance
>             Fix For: 1.4.2
>
>         Attachments: AMBARI-3017.patch, servicesGC.png
>
>
> Every 20-30 calls for service metrics, latency of the next 5 calls are a multiple of
2 or 3. This might be due to garbage collection. But basically in UI, the updates seem to
take longer. 
> The call UI makes is
> {noformat}
> /api/v1/clusters/${cluster}/services?fields=components/ServiceComponentInfo,components/host_components,components/host_components/HostRoles,components/host_components/metrics/jvm/memHeapUsedM,components/host_components/metrics/jvm/memHeapCommittedM,components/host_components/metrics/mapred/jobtracker/trackers_decommissioned,components/host_components/metrics/cpu/cpu_wio,components/host_components/metrics/rpc/RpcQueueTime_avg_time,components/host_components/metrics/flume/flume,components/host_components/metrics/yarn/Queue
> {noformat}



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