On 3.4.2012 14:59, Cesar Martin wrote: > Hi Mike, > Thank you for your fast response. > > blockdev --getra /dev/sdc > 256 That's way too low. Is this setting the same on both machines? Anyway, set it to 4096, 8192 or even 16384 and check the difference. BTW explain analyze is nice, but it's only half the info, especially when the issue is outside PostgreSQL (hw, OS, ...). Please, provide samples from iostat / vmstat or tools like that. Tomas -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
