Available Memory - CheckMK Rail2 Mark I Manual

Check_MK rail2 Mark I - Manual 53 / 57
kernel messages are displayed on the third terminal. In the case of hardware problems, you will find
the relevant messages here. This terminal can be accessed via the key combination CTRL + ALT + F3.
The key combination CTRL + ALT + F1 will take you back to the status screen.

14.2 Available Memory

The system memory of the device is available to your monitoring sites, reduced by the amount of memory
which is needed by the system processes of the Check_MK Appliance.
To provide a stable system platform, a fixed amount if memory is reserved for the mandatory system
processes. The exact amount of reserved memory depends on your device configuration:
• Standalone device (no cluster configuration): 100 MB
• Geclustert: 300 MB
If you want to know exactly how much memory is available to your monitoring sites and how much is cur-
rently used, you can monitor your device using Check_MK. After service discovery the host automatically
monitors a service User_Memory which shows you the current and historical values.
In case your you monitoring instances are trying consume more memory than available, one of the
processes of the monitoring sites is automatically killed. This is done by standard mechanisms of the
Linux Kernel.
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