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168 Appendix C. Probes

C.10.1. RHN Satellite Server::Check Alive

The RHN Satellite Server::Check Alive probe is useful in ensuring the viability of your Monitoring-

enabled Satellite. It reports the following metrics:

• Probe Count — The number of probes conﬁgured on the Satellite.

• Percent OK — The percent of probes in an OK state.

• Percent WARNING — The percent of probes in a WARNING state.

• Percent CRITICAL — The percent of probes in a CRITICAL state.

• Percent PENDING — The percent of probes in a PENDING state.

• Percent UNKNOWN — The percent of probes in an UNKNOWN state.

• Recent State Changes — The number of state changes in the last hour (a measure of volatility).

• Imminent Probes — The number of probes scheduled to run in the next 10 minutes (a measure of

scheduler efﬁciency).

• Execution Time — The maximum, minimum, and average last execution time in seconds.

• Probe Latency — The average difference in seconds between when probes are scheduled to run and

when they actually do run.

• Satellite Latency — The amount of time in seconds since the Satellite last checked in.

If monitoring is critical to your infrastructure, consider setting the probe to run every ﬁve minutes,

alert after a single failure, and renotify after 10 minutes to ensure this probe functions optimally.

Field Value

Timeout* 20

Critical Maximum Satellite Latency

Warning Maximum Satellite Latency

Table C-63. RHN Satellite Server::Check Alive settings

C.10.2. RHN Satellite Server::Disk Space

The RHN Satellite Server::Disk Space probe monitors the free disk space on a Satellite and collects

the following metrics:

• File System Used — The percent of the current ﬁlesystem now in use.

• Space Used — The ﬁle size used by the current ﬁlesystem.

• Space Available — The ﬁle size available to the current ﬁlesystem.

Field Value

Device Pathname* /dev/hda1

Critical Maximum File System Used

Warning Maximum File System Used

Critical Maximum Space Used

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Red Hat NETWORK 3.6 - Información técnica Pagina 180