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C.5.10. Linux::Process Health

The Linux::Process Health probe monitors user-specified processes and collects the following metrics:
  • CPU Usage — The CPU usage rate for a given process in milliseconds per second. This metric reports the time column of ps output, which is the cumulative CPU time used by the process. This makes the metric independent of probe interval, allows sane thresholds to be set, and generates usable graphs (i.e. a sudden spike in CPU usage shows up as a spike in the graph).
  • Child Process Groups — The number of child processes spawned from the specified parent process. A child process inherits most of its attributes, such as open files, from its parent.
  • Threads — The number of running threads for a given process. A thread is the basic unit of CPU utilization, and consists of a program counter, a register set, and a stack space. A thread is also called a lightweight process.
  • Physical Memory Used — The amount of physical memory (or RAM) in kilobytes used by the specified process.
  • Virtual Memory Used — The amount of virtual memory in kilobytes used by the specified process, or the size of the process in real memory plus swap.
Specify the process by its command name or process ID. (PID). Entering a PID overrides the entry of a command name. If no command name or PID is entered, the error Command not found is displayed and the probe will be set to a CRITICAL state.
Requirements — The Red Hat Network Monitoring Daemon (rhnmd) must be running on the monitored system to execute this probe.
Expand
Table C.24. Linux::Process Health settings
Field Value
Command Name
Process ID (PID) file
Timeout* 15
Critical Maximum CPU Usage
Warning Maximum CPU Usage
Critical Maximum Child Process Groups
Warning Maximum Child Process Groups
Critical Maximum Threads
Warning Maximum Threads
Critical Maximum Physical Memory Used
Warning Maximum Physical Memory Used
Critical Maximum Virtual Memory Used
Warning Maximum Virtual Memory Used
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