Bug 1812098

Summary:	Inconsistent data regarding cluster memory consumption
Product:	OpenShift Container Platform	Reporter:	Pawel Krupa <pkrupa>
Component:	Management Console	Assignee:	bpeterse
Status:	CLOSED DUPLICATE	QA Contact:	Yadan Pei <yapei>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	4.4	CC:	aos-bugs, jokerman
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Last Closed:	2020-03-10 14:44:33 UTC	Type:	Bug
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Description Pawel Krupa 2020-03-10 14:15:08 UTC

Description of problem:
Currently in the section "Cluster Utilisation" memory consumption is calculated using following query:

sum(node_memory_Active_bytes)

However, when using "by node" breakdown, the query used is:

`topk(25, sort_desc(node_memory_MemTotal_bytes - node_memory_MemAvailable_bytes))`.

Difference between queries causes differences in perceived memory usage.


Version-Release number of selected component (if applicable):
4.4


How reproducible:
always


Steps to Reproduce:
1. Start a cluster
2. Open Console

Actual results:
Cluster memory usage is calculated by taking only Active memory


Expected results:
Cluster memory consumption should be calculated by using `Total - Available` difference or with following query:

sum(node_memory_MemTotal_bytes - node_memory_MemAvailable_bytes)

Additional info:

This is probably also present in previous OpenShift versions, but I didn't verify it.

Possibly this line needs a change: https://github.com/openshift/console/blob/master/frontend/public/components/dashboard/dashboards-page/cluster-dashboard/queries.ts#L70

Comment 1 bpeterse 2020-03-10 14:44:33 UTC


*** This bug has been marked as a duplicate of bug 1812096 ***