Next, if you can give tempdb its own disk, then configure it to almost fill the drive. If nothing else will ever be on the drive, then you’re better off setting it to be larger than you’ll ever need. There’s no performance penalty, and you’ll never have to worry about autogrow again.
Doesn't tempdb fill the buffer pool, so wouldn't this have an affect on things like the page life expectancy? Or does this only have an effect if tempdb is actually in use?
Another way of asking this question - does the size of tempdb matter to the buffer pool or does the used size of tempdb matter to the buffer pool?