Bug 2095083

Summary:	Observe > Dashboards: Graphs may change a lot on automatic refresh
Product:	OpenShift Container Platform	Reporter:	Andrew Pickering <anpicker>
Component:	Monitoring	Assignee:	Andrew Pickering <anpicker>
Status:	CLOSED ERRATA	QA Contact:	Tai Gao <tagao>
Severity:	low	Docs Contact:
Priority:	low
Version:	4.11	CC:	amuller, anpicker
Target Milestone:	---
Target Release:	4.11.0
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	No Doc Update
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-08-10 11:17:00 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Andrew Pickering 2022-06-09 01:06:16 UTC

When the dashboard auto refresh is enabled, you would expect that on each refresh the graph would maintain the same shape, but shift a little to the left with the passage of time.

However, because the graph data is completely reloaded on each refresh and the query uses a relatively low sampling rate, the graph shape can actually change on each refresh. Depending on the query, there may be no change, a minor change too small to notice, or a large visible change.

Although this is not technically incorrect (we are doing correct data sampling and rendering of the graph on each refresh), depending on the graph it certain can look like a bug.

Comment 3 Tai Gao 2022-06-16 04:32:12 UTC

Release:
4.11.0-0.nightly-2022-06-15-161625

test process:
1.Open admin console, navigate to Observe->Dashboards
2.On the top right corner, select "Refresh Interval" as "15 seconds"
3.Watch graph changes for few minutes

on each refresh the graph would maintain the same shape, but shift a little to the left with the passage of time, test passed

Comment 7 errata-xmlrpc 2022-08-10 11:17:00 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (Important: OpenShift Container Platform 4.11.0 bug fix and security update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2022:5069