Re: 2nd Level Buffer Cache

Robert Haas <robertmhaas@gmail.com> writes:
> It looks like the only way anything can ever get put on the free list
> right now is if a relation or database is dropped.  That doesn't seem
> too good.

Why not?  AIUI the free list is only for buffers that are totally dead,
ie contain no info that's possibly of interest to anybody.  It is *not*
meant to substitute for running the clock sweep when you have to discard
a live buffer.
        regards, tom lane