On Wednesday 10 September 2008, Ryan Hansen <ryan.hansen@xxxxxxxxxxxxxxxxxx> wrote: >Currently it's taking about 12 hours to complete on a 64 bit > server with 3 GB memory allocated (shared_buffer), single SATA 320 GB > drive. I don't seem to get any improvement running the same operation > on a dual opteron dual-core, 16 GB server. > > I'm not asking for someone to solve my problem, just some direction in > the best ways to tune for faster bulk loading, since this will be a > fairly regular operation for our application (assuming it can work this > way). I've toyed with the maintenance_work_mem and some of the other > params, but it's still way slower than it seems like it should be. > So any contributions are much appreciated. Your drive subsystem, such as it is, is inappropriate for a database. Your bottleneck is your drive. Turning fsync off might help. You should also drop all indexes on the table before the COPY and add them back after (which would eliminate a lot of random I/O during the COPY). -- Alan
