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Bug 1988565

Summary: [OVN SCALE][ovn-controller]Periodically trim freed but not reclaimed memory.
Product: Red Hat Enterprise Linux Fast Datapath Reporter: Dumitru Ceara <dceara>
Component: OVNAssignee: OVN Team <ovnteam>
Status: CLOSED DUPLICATE QA Contact: Jianlin Shi <jishi>
Severity: unspecified Docs Contact:
Priority: medium    
Version: FDP 20.HCC: ctrautma, dcbw, jiji, mmichels
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Last Closed: 2021-12-03 15:59:09 UTC Type: Bug
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Bug Blocks: 1958349    

Description Dumitru Ceara 2021-07-30 20:04:25 UTC 
Description of problem:

ovn-controller already automatically trims memory (malloc_trim()) when it detects that the lflow cache usage went down significantly [0]. This was done on the assumption that the lflow-cache is the highest memory consumer in ovn-controller. That's likely not the case anymore so, in lack of a better way to detect when to automatically trim memory, it might make sense to perform this periodically, e.g., every 5 minutes (configurable through an OVN external_id in the local Open_vSwitch ovsdb table).

[0] https://github.com/ovn-org/ovn/commit/ca66895a8deeddb34bec6a0b1da1c3c639fa3023
Comment 1 Dumitru Ceara 2021-12-03 15:59:09 UTC 
Will be fixed by http://patchwork.ozlabs.org/project/ovn/patch/20211123194907.18943-1-dceara@redhat.com/ via bug 2024768.

*** This bug has been marked as a duplicate of bug 2024768 ***