Splunk Search

Help with improving Regex

youngso
SplunkTrust
SplunkTrust

Here is the regex to extract message_type based on CIM.  Could anyone make this faster than 1387 steps?

https://regex101.com/r/dHbs4i/1

 

(?P<message_type>[^.]query|response)\:

 

 

Here is the sample syslog for DNS.

 

Feb  3 00:42:32 FSTAd2346.g.ae3.dns.mil tmm[19902] 2021-02-03 00:42:32 FSTAd2346.g.ae3.dns.mil qid 26818 from 10.130.27.34#13258: view none: query: a-grv-gocdzace.g.ae3.dns.mil IN A + (10.130.44.87%0)
Feb  3 00:42:32 FSTAd2346.g.ae3.dns.mil tmm[19902] 2021-02-03 00:42:32 FSTAd2346.g.ae3.dns.mil qid 57035 to 10.130.27.34#13258: [NOERROR qr,aa,rd] response: a-grv-gocdzace.g.ae3.dns.mil

 

   

Labels (2)
Tags (1)
0 Karma
1 Solution

manjunathmeti
Champion

This executes with 50 steps with the given sample data.

 

(?<message_type>query|response)\:

 

 

View solution in original post

0 Karma

bowesmana
SplunkTrust
SplunkTrust

Unless you really need to have the [\.] in the regex, i.e. you want to match any character in front of the word query, other than the '.' character and to include this in your message type then you should use one of the suggestions.

NB, you don't need the \ in front of :

 

manjunathmeti
Champion

This executes with 50 steps with the given sample data.

 

(?<message_type>query|response)\:

 

 

0 Karma

scelikok
SplunkTrust
SplunkTrust

Hi @youngso,

Below is working in 163 steps based on your sample data. 

\s(?P<message_type>query|response)\:

 

If this reply helps you an upvote and "Accept as Solution" is appreciated.
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!

Make Your Machine Data AI-Ready in Splunk

Every team is getting ready for AI agents.   Thursday, November 12, 2026  |  11AM  PST / 2PM EST   ...

Splunk Asynchronous Forwarding Explained

Splunk asynchronous forwarding is often misunderstood as simply setting autoLBVolume. That is not quite right. ...

How to Monitor AI Agents with Splunk Agent Observability

Let’s say I’m running a travel planning AI app in production. A user asks for three concise hotel options in ...