Oleksandr Diachenko created AMBARI-3573:
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Summary: 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
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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