Appendix C. Probes 151
Field Value
Timeout* 15
Critical Maximum CPU Percent Used
Warning Maximum CPU Percent Used
Table C-15. Linux::CPU Usage settings
C.5.2. Linux::Disk IO Throughput
The Linux::Disk IO Throughput probe monitors a given disk and collects the following metric:
• Read Rate — The amount of data that is read in kilobytes per second.
• Write Rate — The amount of data that is written in kilobytes per second.
To obtain the value for the required Disk number or disk name field, run iostat on the system to
be monitored and see what name has been assigned to the disk you desire. The default value of 0 will
usually give you statistics from the first hard drive connected directly to the system.
Requirements — The Red Hat Network Monitoring Daemon (rhnmd) must be running on the mon-
itored system to execute this probe. Also, the Disk number or disk name parameter must match
the format that is seen when the iostat command is run on the commandline. If the format is not
identical, the configured probe will go into an UNKNOWN state.
Field Value
Disk number or disk name* 0
Timeout* 15
Critical Maximum KB read/second
Warning Maximum KB read/second
Warning Minimum KB read/second
Critical Minimum KB read/second
Critical Maximum KB written/second
Warning Maximum KB written/second
Warning Minimum KB written/second
Critical Minimum KB written/second
Table C-16. Linux::Disk IO Throughput settings
C.5.3. Linux::Disk Usage
The Linux::Disk Usage probe monitors the disk space on a specific file system and collects the fol-
lowing metrics:
• File System Used — The percentage of the file system currently in use.
• Space Used — The amount of the file system in megabytes currently in use.
• Space Available — The amount of the file system in megabytes currently available.
