On Tue, May 3, 2011 at 8:55 AM, Cédric Villemain <cedric.villemain.debian@xxxxxxxxx> wrote: > 2011/5/3 Merlin Moncure <mmoncure@xxxxxxxxx>: >> >> no it will not, or at least there is no guarantee it will be. the >> only way to reset the buffers in that sense is to restart the database >> (and even then they might not be read from disk, because they could >> sit in the o/s cache). to force a read from the drive you'd have to >> reboot the server, or at least shut it down and use a lot of memory >> for some other purpose. > > with linux, you can : "echo 3 > /proc/sys/vm/drop_caches" for the OS cache > yeah -- good point. aside: does that also drop cache on the drive/raid card? merlin -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
