On Wednesday, April 8, 2009, Josh Berkus <j...@agliodbs.com> wrote: > On 4/8/09 9:44 AM, Tom Lane wrote: > > Josh Berkus<j...@agliodbs.com> writes: > > What about seq scans? > > > If the kernel can't read-ahead a seqscan by itself, it's unlikely to > be smart enough to be helped by posix_fadvise ... or at least so I > would think. Do you have reason to think differently? > > > Well, Solaris 10 + UFS should be helped by fadvise -- in theory at least, it > would eliminate the need to modify your mount points for better readahead > when setting up a PG-Solaris server. Solaris-UFS quite lazy about readahead. > Zdenek, Jignesh? > > You're probably correct about Linux and FreeBSD. I don't know if OSX + HFS > supports fadvise. If so, it could only help; readahead on HFS right now is > nonexistant. > > Presumably fadvise is useless on Windows. Anyone know?
It is. -- Dave Page EnterpriseDB UK: http://www.enterprisedb.com -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
