Splunk Search

How to create report on failure rates using count of errors per session and total number of sessions?

sjnorman
Explorer

We'd like to be able to report on failure rates within our application. The metric we will use is errors per session / total # of sessions.

We can identify when a user logs in by searching for a particular search phrase (i.e. "user X logged in") and when an error occurs ("error X occurred while processing the request for user X").

So, total # of sessions = number of log statements that contain the text "user X logged in"
errors per session = number of log statements that contain the text "error X occurred while processing the request for user X"

I know that I can get a count for each of the two statement types, but how do I feed that into a single report?

Tags (2)
1 Solution

strive
Influencer

Assuming that you have written regexes to extract both the texts and the field names that you have given are: UserLogin, Error

Then you can write search like this

Some search terms... | stats count(UserLogin) as TotalSessions, count(Error) as TotalErrors | eval FailureRate = TotalErrors/TotalSessions

View solution in original post

sjnorman
Explorer

I used your suggestion below but matched on raw search terms.

stats count(eval(match(_raw,"login search terms"))) as TotalSessions, count(eval(match(_raw,"error search terms"))) as TotalErrors | eval FailureRate = TotalErrors/TotalSessions

0 Karma

strive
Influencer

Assuming that you have written regexes to extract both the texts and the field names that you have given are: UserLogin, Error

Then you can write search like this

Some search terms... | stats count(UserLogin) as TotalSessions, count(Error) as TotalErrors | eval FailureRate = TotalErrors/TotalSessions

View solution in original post

sjnorman
Explorer

Wouldn't the login and error statements be considered event types, and within those types, fields would be things such as user ID, error type, etc.?

i.e.
user X logged in = Login event type
X = user_id field

Maybe I'm misunderstanding what Splunk considers a field?

0 Karma
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