COS/ WIP report maxing APP SERVERS out

Our accounting continues to max out the app servers, doesn't matter if he is the only person in the system. He runs about 2-3 days worth of data, but crashes the system each time.

Would consider scheduling the process at a later time, but why if when he runs in on Sunday afternoon and nobody is in the system, it still crashes.

Any help or recommendations would be great!

Regards,

--sf