Is there a limitation related to the number of real-time alerts created in Splunk Enterprise?

[erwan_raulet]

I have two servers Splunk Enterprise that collected the same inputs mainly in syslog. I have created some real-time alerts to prevent us when some events occured in our network. I have declared more than ten real-time alerts but only five or six alerts worked.
The others alerts never triggered.
Do you know if there is a limitation with a license or technical constraint in Splunk Enterprise?

[erwan_raulet]

Is the rolling-windows alerts are considered as real-time alerts?

[masonmorales · Accepted solution]

Yes, it's technically constrained somewhat by the number of CPU cores available on your search head. Generally it's better to use scheduled searches on 5 minute (or 1 minute if you really need it that fast) intervals. Once you hit the concurrent search limit (because there aren't any cores left to run the searches), the search head will start queuing ad-hoc search jobs and skipping scheduled searches.

Related question: https://answers.splunk.com/answers/92760/impact-of-real-time-distributed-searches-on-cpu-utilization...