Bug 2108697

Summary:	OCP 4.11 AWS excessively high etcd resources with OVN-Kubernetes on large cluster-density tests
Product:	OpenShift Container Platform	Reporter:	Andrew Collins <ancollin>
Component:	Networking	Assignee:	Jaime Caamaño Ruiz <jcaamano>
Networking sub component:	ovn-kubernetes	QA Contact:	Anurag saxena <anusaxen>
Status:	CLOSED DUPLICATE	Docs Contact:
Severity:	unspecified
Priority:	unspecified	CC:	jhopper, msheth, rravaiol, rsevilla, surya, wking
Version:	4.11
Target Milestone:	---
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	perfscale-ovn
Fixed In Version:		Doc Type:	If docs needed, set a value
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Clone Of:		Environment:
Last Closed:	2022-08-30 09:22:54 UTC	Type:	Bug
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Embargoed:

Description Andrew Collins 2022-07-19 17:50:53 UTC

Description of problem: 
On an OpenShift 4.11.0-rc.1 configured with OVN-Kubernetes, we observed significant regression in the etcd CPU and Memory usage from 4.10 to 4.11.

When compared to Openshift SDN, etcd resources grow at a significantly higher rate than an OpenShift SDN cluster installed with the same version.

Version-Release number of selected component (if applicable):
4.11.0-rc.1

How reproducible:
100%


Steps to Reproduce:
1. Install a 4.11.0-rc.1 cluster with r5.4xlarge masters
2. Scale cluster to 252 nodes
3. Apply cluster-density e2e-benchmarking workload with 4000 iterations 

Actual results:
etcd CPU usage maxes out at 1.73 (of 16) cores, and 7.16 GiB (of 124GiB)


Expected results:
etcd resource consumption scales closer to OpenShiftSDN at this scale, which is 0.088 out of 16 cores and 1.69GiB of 124GiB.

Comment 3 Raul Sevilla 2022-08-30 09:22:54 UTC


*** This bug has been marked as a duplicate of bug 2108679 ***