In a datamodel search why are tstats and stats results not the same?

[YUNHYEONG]

hello splunker.

i changed search to datamodel search(tstats) for speed up.

but, stats and tstats result are slightly different.

average :
ex) tstats : 0.45500000000000007.
stats : 0.4549999999999999.

it is same data.

help me.

Thank you for your reply.

[DavidHourani]

Hi @YUNHYEONG,

Could you please share your stats and tstats query with us ?

Usually if you're not getting the same results it could be that your tstats is running on accelerated whereas stats is taking all data into consideration.

Another reason could be that your DM isn't using all the data because of the defined constraints make sure your DM's constraint is the same as the one you are using with stats search.

Cheers,
David

[koshyk · Accepted solution]

I guess you are hitting number precision problem.
Please have a read on , if it's same issue?
https://answers.splunk.com/answers/451887/how-do-i-stop-splunk-from-rounding-values-that-are.html

[FrankVl]

Did you check whether you get the exact same set of events? Could be that some events have not made it into the data model summary (yet).

[YUNHYEONG]

yes . i checked data. same set of event. all data same

[FrankVl]

Then I guess this is just the wonders of floating point calculations at work? But perhaps someone else here on the board has a better answer for you 🙂