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Hyperic Apache HTTPD Monitoring

I'm using mod_snmp and mod_status monitoring Apache HTTPD. I'm getting some data for metric "Number of Concurrent Connections". However, the metric values appear to be too low when compared against statistics from analysis of Apache HTTPD logs.

 

What does "Number of Concurrent Connections" show? How is it determined? How often mod_snmp take the measurement? Does mod_snmp take snapshots every so often to determine the number of concurrent connections and average them out for the collection interval?

 

Also, is it possible to monitor accept queue length? A long queue, is a good measure to indicate build up in latency.


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