topic Re: Calculate time difference between two events in Splunk Search

Calculate time difference between two events

priya1926 — Thu, 16 Dec 2021 14:21:10 GMT

Hi All,

I am using the below search to calculate time difference between two events ie., 6006 and 6005

6006 is event start time and 6006 is event stopped time. If we find the difference we will get to know the downtime of the system.

This is what i have tried. To few systems it is right and for few it is wrong.

index="wineventlog" host IN (xxxx) EventCode=6006 OR EventCode="6005" Type=Information
| stats latest(_time) as StartUp by host
| join host
[ search index="wineventlog" host IN (xxxx)
| stats latest(_time) as Shutdown by host ]
| eval difference=StartUp-Shutdown
| eval humanTime = strftime(difference*86400)
| table host humanTime

Thanks in advance 🙂

Re: Calculate time difference between two events

richgalloway — Thu, 16 Dec 2021 22:30:59 GMT

I don't understand the logic of this query. If either a 6005 or a 6006 is received then it is considered a "startup" and if any other event is received from the same host then it is a "shutdown". Should one event code indicate a startup and the other a shutdown?

Perhaps this query will help.

index="wineventlog" host IN (xxxx) EventCode=6006 OR EventCode="6005" Type=Information | stats earliest(_time) as Shutdown, latest(_time) as Startup by host | eval Downtime=tostring(Startup-Shutdown, "duration") | table host Shutdown Startup Downtime | fieldformat Shutdown=strftime(Shutdown,"%c") | fieldformat Startup=strftime(Startup,"%c")

Re: Calculate time difference between two events

priya1926 — Fri, 17 Dec 2021 05:10:47 GMT

Thanks that helped 🙂