Check manual page of kernel

kernel

Author: Mathias Kettner

License: GPL

Distribution: official part of Check_MK

Supported Agents: Linux

This check monitors various counters as found in /proc/stat and /proc/vmstat. Examples for those counters are ctxt (the number of process context switches per second), pgmajfault (the number of major page faults per second) and processes (the number of process creations per second).

You can set a critical and warning level on each of those counters or just monitor them without levels in order to collect performance data. Levels you set to None will not be checked.

Item

"Context Switches", "Process Creations", "Major Page Faults" or the name of the kernel counter in question as found in /proc/stat or /proc/vmstat.

Check parameters

Parameter	Type	Description
warning	int	The rate per second which triggers a warning. A value of None disables the level.
critical	int	The rate per second which triggers a critical state. A value of None disables the level.

Performance data

One variable: the current value of the counter.

Inventory

Per default one check for "Major Page Faults", "Context Switches" and "Process Creations" will be created on each host providing that data. You can override this list globally by setting inventory_kernel_counters to a list of strings with those counters that should be inventorized. Use ignored_services if you need a host-specific configuration of the inventory.

Configuration variables

Variable	Type	Description
inventory_kernel_counters	list of strings	List of performance counters the inventory should create checks for. Default is [ "pgmajfault", "ctxt", "processes" ].
kernel_default_levels	int, int	Default levels for newly inventorized checks. Default is (None, None), which disables the levels and makes the check always OK.

Examples

# Make inventory create only checks for pgmajfault
 inventory_kernel_counters = [ "pgmajfault", "pgpgin", "pgpgout" ]