Hello List, i have a few postgresql servers running in a Xen3/DomU and i am having real bead performance... Since read-ahead seems to be a big tuning detail, i would like to know where i have to set my read-ahead size? Do i have to set it in the Dom0 or DomU? My layers looks like this: 1.) Hard Disk (Dom0) 2.) LVM Partitions (Dom0) 3.) sda disk with ext3 (DomU) Or does someone have some experience with Xen and Postgresql? Thanks, Mario -- Sent via pgsql-admin mailing list (pgsql-admin@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-admin