Werk #4441: mem: new configurable thresholds for 'Estimated RAM for new processes'

KomponenteChecks & Agents
Titelmem: new configurable thresholds for "Estimated RAM for new processes"
Datum2017-03-02 13:47:13
Check_MK EditionCheck_MK Raw Edition (CRE)
Check_MK Version1.5.0i1
LevelTrivial Change
KlasseNew Feature
KompatibilitätKompatibel - benötigt kein manuelles Eingreifen

Now thresholds for the graph "Estimated RAM for new processes" are configureable. This is optional and will use the "MemAvailable" value, which is part of meminfo since kernel version 3.14. This value will not be checked on older kernel versions and thresholds will not be used even if a rule has been set.

From kernel.org: An estimate of how much memory is available for starting new applications, without swapping. Calculated from MemFree, SReclaimable, the size of the file LRU lists, and the low watermarks in each zone. The estimate takes into account that the system needs some page cache to function well, and that not all reclaimable slab will be reclaimable, due to items being in use. The impact of those factors will vary from system to system. (https://www.kernel.org/doc/Documentation/filesystems/proc.txt)