On Tue, 2005-04-05 at 11:39, Jim C. Nasby wrote: > On Tue, Apr 05, 2005 at 11:13:06AM -0400, Ian Westmacott wrote: > > On Tue, 2005-04-05 at 00:41, Jim C. Nasby wrote: > > > We'll only answer if you do a write-up on your database. :P > > > > > > Seriously, those are some seriously big numbers. What else is the > > > database doing? What hardware is it running on? > > > > > > We run on a dual 3.2GHz P4 with 2GB RAM, but are still > > finalizing the storage hardware. We've tried various > > flavors of RAID, filesystems and volume management (and > > are anxious to try out tablespaces in 8). We've found > > fragmentation to be our largest limiting factor. XFS > > helps with that, and seems to provide the highest > > sustained throughput on raw tables, but its not the end > > of the story since fragmentation is still high. > > What else is the database doing besides the inserts? A proportionally small number of updates, no deletes, and a set of moderately complex queries. > And if UFS is available for linux you should might try it. Would UFS help the fragmentation issue? We have seen ext3 allocating blocks in 2-4 pages, while XFS manages 8-16 pages. Thanks, --Ian
