Re: Vacuums on large busy databases

On Thu, Sep 14, 2006 at 05:52:02PM -0700, Jeff Davis wrote:
>Any long-running system will have very little "free" memory. Free memory
>is wasted memory, so the OS finds some use for it.

The important part of the output of "free" in this context isn't how
much is free, it's how much is cache vs how much is allocated to
programs. Other os's have other ways of telling the same thing. Neither
of those numbers generally has much to do with how much shows up in ps
when large amounts of shared memory are in use.

Mike Stone