Werk #4725: Significant improvement of Check_MK check helper memory usage

Komponente Core & setup
Titel Significant improvement of Check_MK check helper memory usage
Datum 18.05.2017
Checkmk Edition Checkmk Enterprise (CEE)
Checkmk-Version 1.4.0b8 1.5.0i1
Level Bedeutende Änderung
Klasse Bugfix
Kompatibilität Kompatibel - benötigt kein manuelles Eingreifen

The memory usage of the Check_MK check helpers, especially the growth that occures during runtime, has been reduced significantly.

One example which has been measured in a single site with 30 Check_MK check helpers configured and a large configuration (a lot of hosts, services, tags and rulesets):

Before this change it was executing 1000 service checks per second with a total memory usage of about 15 GB.

After this change it is now performing 1100 service checks per second with a total memory usage of 3.5(!) GB.

The exact memory reduction highly depends on the Check_MK configuration, but should be measurable in all medium to large environments.

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