Set Item Update Interval to run every 15 minutes after 5th minute of an hour

[milospt1]

Hello everyone,

I am trying to understand how Custom Update interval works and wondering if it would be possible to have a bit more complex schedule, I have been using this document as a reference https://www.zabbix.com/documentation...stom_intervals

What I want to achieve is to have Item Update Interval which would execute at intervals of hour:minute-05, 20, 35, 50
The reason for this is I am using a template Website By Browser and I have many hosts(31 in total) that are executing web check script by default time interval 0s;m/15, so basically 00:00, 00:15, 30, 45, 60, some hosts have a different item update interval of 0s;m/25 and I am getting false positives at 0 minute and 60 minute of an hour due to resource overload on a separate Selenium Grid server so I want to split up these checks to not have them overlap at any time.

I could manually set update interval to 15 min then wait for lets say 09:05 but that one would be hard to keep a track of, especially if I have to make any changes. To split the load properly I though about having group of hosts execute at for example:
Group1: 00:00, 00:15, 00:30, 00:45, 01:00
Group2: 00:05, 00:20, 00:35, 00:50, 01:05
Group3: 00:10, 00:25, 00:40, 00:55, 01:10

And so on, not sure if this is even possible to accomplish in Zabbix 7.0 without manually waiting for specific time to kick off checks. Any advice on this is appreciated.

[cyber]

Group1: m/15
Group2::m5-50/15
Group3: m10-55/15

[cyber]

Group1: m/15
Group2::m5-50/15
Group3: m10-55/15

[milospt1]

Group1: m/15
Group2::m5-50/15
Group3: m10-55/15

Thank you for the suggestion, I would like to understand how this works, please correct me if my understanding is wrong, lets take group2 as an example.
It means that between minute 5 and minute 50, item would be checked every 15 minutes?
For the Group 3, principle would be the same, from minute 10 to minute 55, perform item check every 15 minutes?

[Brewer]

Your deduction is correct.
A similar example can be found in the documentation you provided in your original post. It just includes a specific hour (h9), but it's the same concept:

h9m10-40/1

= every day at 9:10, 9:11, 9:12, ... 9:40

[milospt1]

Your deduction is correct.
A similar example can be found in the documentation you provided in your original post. It just includes a specific hour (h9), but it's the same concept:

h9m10-40/1

= every day at 9:10, 9:11, 9:12, ... 9:40

Thank you for the explanation! The hour portion from the documentation kind of confused me in figuring this one out.

[cyber]

yup exactly.. based on docs directly..