We have a SQL server which has 24 GB RAM that runs slowly when doing a big SSIS package run (last about 4 hours). I see Page Life expectancy is very low , it goes down to 7 when the packages are running, when it is not running the server shows 25000 PLE. I think it is under memory pressure when the packages run. But the developer says the PLE could be a bit of false alarm where ETL concerned, They ran about 100 packages each night, most of thos 100 packages access different data set. So they think most of the packages don't reuse any cached data the previous pacakges users.
So why the PLE is so slow when the Packages run?
Thanks
SQLFriend