Hi,
The alarm only gets evaluated when the group executes. So, if the group runs every 30 seconds and the alarm only stays high for 5 seconds, there’s a good chance you’ll miss it.
So, the straight forward solution is to run the group faster. However, this is often not desirable for various reasons (you probably have it running at 30 seconds for a reason, like you don’t want to insert millions of records). A second option which might be better would be to move the alert (and any similar one from other groups) into a separate group, and mark them all as READ-ONLY. Read only items aren’t written to the database, but are evaluated for alerting. If all of the items are read only, and you turn off “store timestamp” and “auto create table”, the group shouldn’t try to create a table or write to the db at all, and will essentially just be an alert executor.
Hope this helps,