rex for extracting particular keyword in logs

[prajwal_94]

I am searching for exceptions/the type of exception in logs and using below query-

index=abcd ("*Exception" OR "*exception") | rex "(?P<Exception>.*\..*Exception:)" | eval mvFields=split(Exception, " ") | eval Exception1=mvindex(mvFields,mvfind(mvFields,"\..*Exception")) | timechart span=5m count by Exception1

but when I expand the time range to 4-7 days, I get the below alert message(although I get the output) 

Error in rex command: regex= "(?P<Exception>.*\..*Exception:)" has exceeded configured match_limit, consider raising the value in limits.conf

looking for more efficient way in which the above search can be refined without making any changes to limits.conf

[ITWhisperer · Accepted solution]

The initial search for "exception" is case insensitive and doesn't need the leading wildcard

It looks like you are trying to capture the exception delimited by spaces with at least one dot.

index=abcd exception 
| rex "\s(?P<Exception>[^\s]*\.[^\s\.]*Exception:)" 
| timechart span=5m count by Exception