[#ZBX-21965] Incorrect SLA calculation

[ZBX-21965] Incorrect SLA calculation Created: 2022 Nov 23 Updated: 2023 Oct 07
Status:	Confirmed
Project:	ZABBIX BUGS AND ISSUES
Component/s:	None
Affects Version/s:	6.2.4, 6.4.0beta3
Fix Version/s:	None

Type:

Problem report

Priority:

Major

Reporter:

Egor T.

Assignee:

Zabbix Development Team

Resolution:

Unresolved

Votes:

Labels:

None

Remaining Estimate:

Not Specified

Time Spent:

Not Specified

Original Estimate:

Not Specified

Environment:

zabbix_server (Zabbix) 6.2.0
Revision db780895726 4 July 2022, compilation time: Jul 4 2022 07:16:54
If

Attachments:

image-2022-11-23-16-06-21-495.png

image-2022-11-23-16-06-32-604.png

image-2022-11-23-16-08-53-730.png

image-2022-11-23-16-09-47-757.png

image-2022-11-23-16-10-07-823.png

Issue Links:

Sub-task
depends on	ZBX-17188	Problems with negative duration are c...	Open

Description

Based on followed documentation :

Expected behavior in case of adding downtime in the future and in the past: SLI should be corrected in accordance of downtime periods.

Based on my experiments:

Today: 23.11 at 9:01 I can see that service in "not OK" status from the beginning.

I've tried to add planned downtime in the past - result:

Downtime reduced for 3 hours but SLI was not changed. See below:

In cease of excluded downtime in future - result the same:

If my understanding correct daily SLI calculation should be like this:

(("Period from 00:00" - ("Not OK period" - "excluded downtimes"))/"Period from 00:00")*100%

If so - this is bug. Please check and let me know.

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