Red Hat NETWORK SATELLITE 5.1.0 - CHANNEL MANAGEMENT, Reference Manual

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The probes that have crossed their WARNING thresholds.
Critical
The probes that have crossed their CRITICAL thresholds or reached a critical status by
some other means. (Some probes become critical when exceeding their timeout period.)
While adding probes, select meaningful thresholds that, when crossed, notify you and your
administrators of problems within your infrastructure. Timeout periods are entered in seconds
unless otherwise indicated. Exceptions to these rules are noted within the individual probe
references.
Important
Some probes have thresholds based on time. In order for such CRITICAL and
WARNING thresholds to work as intended, their values cannot exceed the
amount of time allotted to the timeout period. Otherwise, an UNKNOWN status is
returned in all instances of extended latency, thereby nullifying the thresholds.
For this reason, Red Hat strongly recommends ensuring that timeout periods
exceed all timed thresholds.
Remember that Red Hat recommends running your probes without notifications for a time to
establish baseline performance for each of your systems. Although the default values provided
for probes may suit your needs, every organization has a different environment that may require
altering thresholds.
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
.
2.1. Apache::Processes
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.
Appendix C. Probes
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