Bug 2028686

Summary: Document the HCI ratio for cephadm osd memory auto_tune option "autotune_memory_target_ratio = 0.2"
Product: [Red Hat Storage] Red Hat Ceph Storage Reporter: Vikhyat Umrao <vumrao>
Component: DocumentationAssignee: Mary Frances Hull <mhull>
Documentation sub component: Default QA Contact: Pawan <pdhiran>
Status: CLOSED CURRENTRELEASE Docs Contact: Aron Gunn <agunn>
Severity: high    
Priority: unspecified CC: agunn, asriram, hyelloji, kdreyer, mgowri, pdhiran, rmandyam
Version: 5.0   
Target Milestone: ---   
Target Release: 5.1   
Hardware: Unspecified   
OS: Unspecified   
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Last Closed: 2022-04-05 11:03:19 UTC Type: Bug
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2001149    
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Description Vikhyat Umrao 2021-12-02 23:18:14 UTC 
Describe the issue:
Document the HCI ratio for cephadm osd memory auto_tune option
upstream link - https://docs.ceph.com/en/latest/cephadm/install/#enabling-osd-memory-autotuning

In case the cluster hardware is not exclusively used by Ceph (hyper-converged), reduce the memory consumption of Ceph like so:

# hyperconverged only:
ceph config set mgr mgr/cephadm/autotune_memory_target_ratio 0.2
Then enable memory autotuning:

ceph config set osd osd_memory_target_autotune true


the value for HCI use case should be:

autotune_memory_target_ratio = 0.2
Comment 2 Ranjini M N 2021-12-10 11:57:01 UTC 
*** Bug 2026906 has been marked as a duplicate of this bug. ***