https://community.splunk.com/t5/Splunk-Search/Find-difference-between-time-now-and-last-event-time/m-p/288315#M165089 <P>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</P> <PRE><CODE>| tstats max(_time) as last_event WHERE index=....... | eval diff=tostring(now()-last_event,"duration") | table diff </CODE></PRE> Thu, 16 Nov 2017 21:24:07 GMT somesoni2 2017-11-16T21:24:07Z https://community.splunk.com/t5/Splunk-Search/Find-difference-between-time-now-and-last-event-time/m-p/288314#M165088 <P>I am not sure why I am not getting results with this query, any suggestions?</P> <P>index= ______<BR /> | stats max(_time) as last_event <BR /> | eval timenow=strftime(now(), "%Y-%m-%d %H:%M:%S.%3N")<BR /> | eval last_event=strftime('last_event', "%Y-%m-%d %H:%M:%S.%3N") <BR /> | eval diff = tostring((timenow - last_event), "duration") <BR /> | table diff </P> Tue, 29 Sep 2020 16:49:33 GMT https://community.splunk.com/t5/Splunk-Search/Find-difference-between-time-now-and-last-event-time/m-p/288314#M165088 JoshuaJohn 2020-09-29T16:49:33Z https://community.splunk.com/t5/Splunk-Search/Find-difference-between-time-now-and-last-event-time/m-p/288315#M165089 <P>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</P> <PRE><CODE>| tstats max(_time) as last_event WHERE index=....... | eval diff=tostring(now()-last_event,"duration") | table diff </CODE></PRE> Thu, 16 Nov 2017 21:24:07 GMT https://community.splunk.com/t5/Splunk-Search/Find-difference-between-time-now-and-last-event-time/m-p/288315#M165089 somesoni2 2017-11-16T21:24:07Z