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Find difference between time now and last event time

Contributor

I am not sure why I am not getting results with this query, any suggestions?

index= ______
| stats max(time) as lastevent
| eval timenow=strftime(now(), "%Y-%m-%d %H:%M:%S.%3N")
| eval lastevent=strftime('lastevent', "%Y-%m-%d %H:%M:%S.%3N")
| eval diff = tostring((timenow - last_event), "duration")
| table diff

1 Solution

SplunkTrust
SplunkTrust

First problem with this query was that you're trying to arithmetic operation of string fields (strftime give string formatted date). You need timestamps in epoch format and format it later if needed. Second thing, not problem but big scope of optimization is to use tstats command instead of regular search. So give this a try

| tstats max(_time) as last_event WHERE index=.......
| eval diff=tostring(now()-last_event,"duration") | table diff

View solution in original post

SplunkTrust
SplunkTrust

First problem with this query was that you're trying to arithmetic operation of string fields (strftime give string formatted date). You need timestamps in epoch format and format it later if needed. Second thing, not problem but big scope of optimization is to use tstats command instead of regular search. So give this a try

| tstats max(_time) as last_event WHERE index=.......
| eval diff=tostring(now()-last_event,"duration") | table diff

View solution in original post