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Bug #21798
closedBluestore cache overcommits OSD memory resulting in oom kill
Status:
Resolved
Priority:
Normal
Assignee:
-
Category:
OSD
Target version:
-
% Done:
0%
Source:
Community (user)
Tags:
Backport:
Regression:
No
Severity:
2 - major
Reviewed:
Description
The default value for bluestore_cache_size_ssd is 3G. Our server has 6 OSDs and 16G of ram, so running with the default value the memory usage eventually grows to >18G and triggers the oom killer. We are running luminous (12.2.1-1xenial). Lowering the value to 1G solved the problem.
This default value should only be honored if the available memory allows it. Maybe a warning state should be present if the cache setting would cause this, and/or if the OSD server is running out of memory.
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