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## calculate percentage from two sums?

Path Finder

I'm hoping this doesn't stretch the bounds of "no question is too 'newbie'" part of the FAQ:

I'm attempting to perform a simple calculation of sum(attempts)/sum(successes) and show three columns of data: successes, attempts and percentage. I can't seem to get this data to display with a timechart span=5m clause. Can anyone help me out with the correct syntax? I did some searching and saw a reference to something that indicates this is on the right track, but I can't seem to make it work

``````eval percent_difference=((sum(attempts)/sum(Successes))*100) | table percent_difference
``````

Splunk returns "Error in 'eval' command: The 'sum' function is unsupported." when I use this.

Tags (2)
1 Solution
SplunkTrust

are 'attempts' and 'successes' fields that are being extracted from each event?

Is the difference in casing intentional? In one place you say 'successes', but in the search it's in title case. (beware that field names in splunk are case-sensitive)

Assuming the events in `<your search>` are returning fields called 'attempts' and 'successes', the following will give you a timechart where the y-axis is showing the percentage of successes for each time-bucket in the chart.

``````<your search> | timechart sum(attempts) as totalAttempts sum(successes) as totalSuccesses
| eval percent=totalSuccesses*100/totalAttempts | fields - totalAttempts totalSuccesses
``````
SplunkTrust

are 'attempts' and 'successes' fields that are being extracted from each event?

Is the difference in casing intentional? In one place you say 'successes', but in the search it's in title case. (beware that field names in splunk are case-sensitive)

Assuming the events in `<your search>` are returning fields called 'attempts' and 'successes', the following will give you a timechart where the y-axis is showing the percentage of successes for each time-bucket in the chart.

``````<your search> | timechart sum(attempts) as totalAttempts sum(successes) as totalSuccesses
| eval percent=totalSuccesses*100/totalAttempts | fields - totalAttempts totalSuccesses
``````
Path Finder

Thanks! I was able to get this to work. The mixed case was accidental, and thanks for pointing it out.