When we upgraded from linux-2.6.24 to ./linux-2.6.27, our pg_dump duration increased by 20%. My first attempt at resolution was to boot with elevator=deadline. However that's actually the default IO scheduler in both kernels. The two dmesg's are at: https://www.norchemlab.com/tmp/linux-2.6.24-22.45-server https://www.norchemlab.com/tmp/linux-2.6.27-14.41-server The database partition is: xfs / lvm / aic79xx / scsi. Booting back into the .24 kernel brings the pg_dump down to 5 hours (rather than 6, for daily 20GB output compressed by pg_dump -Fc). Does anyone know what might be different which could cause such a drastic change? Thanks, Justin -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
