On 26 Feb 2004 at 13:58, Dror Matalon wrote:
>
> which brings me back to my question why not make Freebsd use more of its
> memory for disk caching and then tell postgres about it.
>
I think there is some confusion about maxbufsize and hibufspace. I looking at a comment in the FreeBSB source 4.9 that explains this. I think you will want to increase effective_cache to match maxbufsize not hibufspace but I could be wrong.
$FreeBSD: src/sys/kern/vfs_bio.c,v 1.242.2.21 line 363
