The probes in this section may be applied to instances of the Apache HTTP 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.
The Apache::Processes probe monitors the processes executed on an Apache HTTP 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 another process or the parent 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.
| 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 |
Table C-1. Apache::Processes settings
The Apache::Traffic probe monitors the requests on an Apache HTTP Server and collects the following metrics:
Current Requests — The number of requests being processed by the server at probe runtime.
Request Rate — The events per second of accesses to the server 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.
| 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) |
Table C-2. Apache::Traffic settings
The Apache::Uptime 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).