Getting All active Instance using queryProcessAnalytics function

I would suggest you look into batching your query, like by 100 or 1000 rows, to avoid running into the aforementioned report timeout. Are you doing this data collection in a running process or just inside a rule/interface?

I am running inside expression rule

Thanks for the response,
May be i am wrong but I have done another Approach :
In main expression rule am getting records this time batch size is 1000 ,based on totalCount am generating startIndex like
1+enumerate(int(local!portalDataSubset/1000))*1000 it will give 1,1001,2001,3001....etc.
In sub expression rule am calling same portal report and same filter using a!queryProcessAnalytics() above startIndexs are looping.
Example:
apply(rule!subExpressionRule(_),{1,1001,2001,3001....etc}) , In this case up to 10000 am getting data but whenever we pass 10001 paginInfo startIndex it return's empty portalDataSubset.

Thanks for the response,
May be i am wrong but I have done another Approach :
In main expression rule am getting records this time batch size is 1000 ,based on totalCount am generating startIndex like
1+enumerate(int(local!portalDataSubset/1000))*1000 it will give 1,1001,2001,3001....etc.
In sub expression rule am calling same portal report and same filter using a!queryProcessAnalytics() above startIndexs are looping.
Example:
apply(rule!subExpressionRule(_),{1,1001,2001,3001....etc}) , In this case up to 10000 am getting data but whenever we pass 10001 paginInfo startIndex it return's empty portalDataSubset.