Count the number of Items with the same value inside a Group

[Giacomo]

Hi All!

I'm playing with Calculated Item to count the number of Items (with the same name = exstreamingStreamNumber) inside a Group that have value =1.

I can count the Items with this:
item_count(/*/exstreamingStreamNumber?[group="Exstreamer"])

But, how to specify the value of the Item?
Is this the right way to count the number of Items inside a Group that match a value?

Thank you!

[Brambo]

First of all, you say you want item values but then later you say the amount of items?
Both can't be in 1 item.
If you want the sum of all item values matching your expression use a calculated item with sum(last_foreach(<expression>))

[Giacomo]

Hi Brambo,

thanks for answering... I try to explain better using my Dashboard (below).
Here are reported my hosts.
I want to count how many hosts have the key StreamNumber = 3.
I've tried with Aggregate Functions with no luck.

[Brambo]

I understand what you want.
And this is maybe possible when the items are discovered by LLD, not sure though.
As the item count function cant filter on item value, but it can on tags.
What you could test in a LLD rule is to set the item TAG with a value. Then you could write the calculated item with ?[tag="tagname:3"] I'm only not really certain if the tags are overwritten every time.
Otherwise triggers is the route to go but then you can only show it as a problem and I guess you are not looking for that.