On Mon, Jul 14, 2008 at 3:08 PM, Mason Hale <masonhale@xxxxxxxxx> wrote: > Vacuum operations on several tables are taking much longer than they > previously were. > We currently have 3 autovacuum processes that have been running more than 3 > days each. > The tables are large (between 40 and 90GB each). > Postgresql version is 8.3.1 > maintenance_work_mem is 512MB (on a 32GB server). > Any ideas what would make vacuum take so long? > What can I do to speed things up? Have you adjusted your vacuum / autovacuum cost parameters up? that will certainly slow down vacuums.