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D.2. Apache 1.3.x and 2.0.x

The probes in this section may be applied to instances of the Apache Web server. Although the default values presume you will apply these probes using standard HTTP, you may also use them over secure connections by changing the application protocol to https and the port to 443.

D.2.1. Apache::Processes
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The Apache::Processes probe monitors the processes executed on an Apache Web server and collects the following metrics:
  • Data Transferred Per Child — Records data transfer information only on individual children. A child process is one that is created from the parent process or another process.
  • Data Transferred Per Slot — The cumulative amount of data transferred by a child process that restarts. The number of slots is configured in the httpd.conf file using the MaxRequestsPerChild setting.
The ExtendedStatus directive in the httpd.conf file of the Web server must be set to On for this probe to function properly.
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Table D.1. Apache::Processes settings
Field Value
Application Protocol* http
Port* 80
Pathname* /server-status
UserAgent* NOCpulse-ApacheUptime/1.0
Username
Password
Timeout* 15
Critical Maximum Megabytes Transferred Per Child
Warning Maximum Megabytes Transferred Per Child
Critical Maximum Megabytes Transferred Per Slot
Warning Maximum Megabytes Transferred Per Slot

D.2.2. Apache::Traffic
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The Apache::Traffic probe monitors the requests on an Apache Web server and collects the following metrics:
  • Current Requests — The number of requests being processed by the server at probe runtime.
  • Request Rate — The accesses to the server per second since the probe last ran.
  • Traffic — The kilobytes per second of traffic the server has processed since the probe last ran.
The ExtendedStatus directive in the httpd.conf file of the Web server must be set to On for this probe to function properly.
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Table D.2. Apache::Traffic settings
Field Value
Application Protocol* http
Port* 80
Pathname* /server-status
UserAgent* NOCpulse-ApacheUptime/1.0
Username
Password
Timeout* 15
Critical Maximum Current Requests (number)
Warning Maximum Current Requests (number)
Critical Maximum Request Rate (events per second)
Warning Maximum Request Rate (events per second)
Critical Maximum Traffic (kilobytes per second)
Warning Maximum Traffic (kilobytes per second)

D.2.3. Apache::Uptime
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The Apache::Uptime probe stores the cumulative time since the Web server was last started. No metrics are collected by this probe, which is designed to help track service level agreements (SLAs).
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Table D.3. Apache::Uptime settings
Field Value
Application Protocol* http
Port* 80
Pathname* /server-status
UserAgent* NOCpulse-ApacheUptime/1.0
Username
Password
Timeout* 15
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