2012/2/29 Stefan Keller <sfkeller@xxxxxxxxx>: > 2012/2/29 Jeff Janes <jeff.janes@xxxxxxxxx>: >>> 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. ...or let's try /dev/zero instead /dev/null: tar cf /dev/zero $PG_DATA/base -Stefan -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
