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From "Oleksandr Diachenko (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (AMBARI-3573) Configure Ganglia Web Server to use KeepAlive connections
Date Tue, 22 Oct 2013 14:31:45 GMT

     [ https://issues.apache.org/jira/browse/AMBARI-3573?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Oleksandr Diachenko updated AMBARI-3573:
----------------------------------------

    Attachment: AMBARI-3573.patch

> Configure Ganglia Web Server to use KeepAlive connections
> ---------------------------------------------------------
>
>                 Key: AMBARI-3573
>                 URL: https://issues.apache.org/jira/browse/AMBARI-3573
>             Project: Ambari
>          Issue Type: Task
>          Components: agent
>    Affects Versions: 1.5.0
>            Reporter: Oleksandr Diachenko
>            Assignee: Oleksandr Diachenko
>             Fix For: 1.5.0
>
>         Attachments: AMBARI-3573.patch
>
>
> When performance profiling a 20 node cluster it was discovered that using KeepAlive http
connections resulted in a 7% performance gain for a query that returned all host_component
metrics.
> The GangliaPropertyProvider gets ganglia data by invoking the cgi script rrd.py.  This
results in a new HttpUrlConnection and input stream being obtained for each request to the
ganglia back end.  
> By default KeepAlive is enabled for Apache but we should ensure this is the case for
the http server that provides rrd.py.
> For apache, this is configured in httpd.conf.  



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