Jon Nelson <jnelson+pgsql@xxxxxxxxxxx> wrote: > Greg Smith <greg@xxxxxxxxxxxxxxx> wrote: >> Usually the sequence used to remove all cached data from RAM >> before a benchmark is: > > All cached data (as cached in postgresql - *not* the Linux system > caches)..., right? No. The stop and start of PostgreSQL causes empty PostgreSQL caches. These lines, in between the stop and start, force the Linux cache to be empty (on recent kernel versions): sync echo 3 > /proc/sys/vm/drop_caches -Kevin -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
