We upgraded the server last weekend from 12gb to 32gb.
Part of the reason was low PLE numbers.
So now the target pages number has gone up - but only to about 10gb. Well OK, maybe we have more RAM than we need. Yet, PLE keeps getting hit back down below 300, and the target pages does not increase.
I don't understand that. Apparently SQL Server is conservative about expanding its target. I'd have guessed it would bloat right up to the limit (26gb) without much delay. But the system has been quite busy all day, and the target pages does not increase.
Is there a simple explanation for that?
Like - is PLE decremented if a page is even dirty, even if it gets written and does not have to be reread?
Thanks.
Josh
