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220 Appendix C. Probes
C.5.7. Linux::Memory Usage
The Linux::Memory Usage probe monitors the memory on a system and collects the fol-
lowing metric:
•
RAM Free — The amount of free random access memory (RAM) in megabytes on a
system.
You can also include the reclaimable memory in this metric by entering yes or no in the
Include reclaimable memory field.
Requirements — The Red Hat Network Monitoring Daemon (
rhnmd
) must be running on
the monitored system to execute this probe.
Field Value
Include reclaimable memory no
Timeout* 15
Warning Maximum RAM Free
Critical Maximum RAM Free
Table C-21. Linux::Memory Usage settings
C.5.8. Linux::Process Counts by State
The Linux::Process Counts by State probe identifies the number of processes in the fol-
lowing states:
•
Blocked — A process that has been switched to the waiting queue and whose state has
been switched to
waiting
.
•
Defunct — A process that has terminated (either because it has been killed by a signal or
because it has called
exit()
) and whose parent process has not yet received notification
of its termination by executing some form of the
wait()
system call.
•
Stopped — A process that has been stopped before its execution could be completed.
•
Sleeping — A process that is in the
Interruptible
sleep state and that can later be
reintroduced into memory, resuming execution where it left off.
Requirements — The Red Hat Network Monitoring Daemon (
rhnmd
) must be running on
the monitored system to execute this probe.