I'm currently using ITSI to monitor some services from which the KPI are calculated over small time window (15 minutes by default). I see that the calculation window of the KPI base search creation tool do not have any option than 24 hours.
I would like to know if it is possible to have a KPI calculated over a bigger time window (eg, a week or a month). I have the feeling that that is not the purpose of ITSI, but I'm curious.
As KPI are summary searches, there are no use cases for reporting on pooling of more than 24h.
if you want to report on data from a larger timerange, you could precalculate it using another scheduled search, and summarize the results (or use a lookup), then carve a custom KPI to retrieve it, and add fake _time fields.