Splunk Search

calculating average

pmr
Explorer

Need some help on search string to calculate 10 minute average and generate alert.
say for example Virtual memory usage 10 minute average > 10000 generate an alert. How can we calculate 10 minute average ?
this would be from a table event so need to use multikv. sample event below :

USER               PID   PSR   pctCPU       CPUTIME  pctMEM     RSZ_KB     VSZ_KB   TTY      S       ELAPSED  COMMAND             ARGS
root                 1     1      0.0      00:00:16     0.0        788      10384   ?        S   19-08:11:30  init                [3]
root                 2     1      0.0      00:00:00     0.0          0          0   ?        S   19-08:11:30  [kthreadd]          <noArgs>
root                 3     0      0.0      00:00:00     0.0          0          0   ?        S   19-08:11:30  [migration/0]       <noArgs>
root                 4     0      0.0      00:00:00     0.0          0          0   ?        S   19-08:11:30  [ksoftirqd/0]       <noArgs>
root                 5     0      0.0      00:00:26     0.0          0          0   ?        S   19-08:11:30  [events/0]          <noArgs>
root                 6     0      0.0      00:00:00     0.0          0          0   ?        S   19-08:11:30  [cpuset]            <noArgs

thanks
pmr

Tags (1)
0 Karma

Masa
Splunk Employee
Splunk Employee

The sample is ps output. Assuming you get the ps output every minutes or so. Virtual memory usage is VSZ_KB per PID in the event. You can run the following search every 10 minutes and set the alert when there is events more than one;

sourcetype=ps earliest=-11m@m latest=-1m@m
   | multikv fields VSZ_KB PID
   | chart avg(VSZ_KB) AS AvgSizeKB by PID 
   | where AvgSizeKB > 10000 
   | sort - AvgSizeKB
0 Karma

pmr
Explorer

thank you.. works perfect.

-pmr

0 Karma

pmr
Explorer

Folks,
Any help on this ?

-pmr

0 Karma
Got questions? Get answers!

Join the Splunk Community Slack to learn, troubleshoot, and make connections with fellow Splunk practitioners in real time!

Meet up IRL or virtually!

Join Splunk User Groups to connect and learn in-person by region or remotely by topic or industry.

Get Updates on the Splunk Community!

Your Path to AgenticOps: AI Experiences for Every Splunk Practitioner

Your Path to AgenticOps: AI Experiences for Every Splunk Practitioner   Watch on demand us for a demo-driven ...

The Data Connection - October 2026

We all have data. Lots of it. But that’s not the problem – it’s understanding what we should we do with it, ...

Beyond the Acceleration Zone: Maximizing Your Success with Splunk Customer Experience ...

Customer success is built on tailored guidance and accessible resources. As a Splunk user, you are encouraged ...