2012/2/29 Jeff Janes <jeff.ja...@gmail.com>: >> It's quite possible the vacuum full is thrashing your disk cache due >> to maintainance_work_mem. You can overcome this issue with the tar >> trick, which is more easily performed as: >> >> tar cf /dev/null $PG_DATA/base > > But on many implementations, that will not work. tar detects the > output is going to the bit bucket, and so doesn't bother to actually > read the data.
Right. But what about the commands cp $PG_DATA/base /dev/null or cat $PG_DATA/base > /dev/null ? They seem to do something. -Stefan -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
