topic Re: Help with using tstats in search in Splunk Search

How to use tstats in search?

Vani_26 — Thu, 26 Jan 2023 19:12:32 GMT

Hi all
when i run my original query i am getting one result and when i execute the same query using tstats i am getting different output.
AVG IS NOT MATCHING.
how to modify the query to match the count.

my original query:

index=apl-cly-sap sourcetype=cly:app:sap |search processName="applicationstatus" |stats avg(plantime)

output:
1233.43223454

tstats query:

|tstats count where index=apl-cly-sap sourcetype=cly:app:sap TERM(processName=applicationstatus) by PREFIX(plantime=) |rename plantime= as Time |stats avg(Time)

output:
1345.7658755

Re: Help with using tstats in search

yuanliu — Thu, 26 Jan 2023 06:34:07 GMT

That is because your second query (with tstats) is equivalent to

index=apl-cly-sap sourcetype=cly:app:sap |search processName="applicationstatus" | stats count by plantime | stats avg(plantime)

which is semantically different from your first one.

Unless plantime is extracted at index time, there is no way to do avg on this field in tstats.

Re: Help with using tstats in search

Vani_26 — Sat, 28 Jan 2023 20:43:39 GMT

@yuanliu What you said is correct, but when i use tstats i am getting avg of plantime but not matching the count with original query.

As per my knowledge, when i run a tstats query if the field is not an index time field it will throw error and not show any results.
But here i am getting the results but avg of plantime is not matching. if i am getting results means the plantime is indextime field right?

Re: Help with using tstats in search

yuanliu — Sun, 29 Jan 2023 06:15:07 GMT

Your first search is semantically equivalent to this tstats (provided that all values of the field processName are extracted from key-value pair with equal sign):

| tstats avg(plantime) where index=apl-cly-sap sourcetype=cly:app:sap TERM(processName=applicationstatus)

Do you mean you get non-null result from the above that is different from your first search?