Forum OpenACS Development: Re: performance hint for busy sites with linux
Another option in general is to switch to other file systems, especially with newer kernels. Here are some options tested with PostgreSQL 9 with some recent Linux kernels, using already data=writeback per default
One can see, ext3 or ext4 are not among the fastests for TPC-B with PostgreSQL. I would not recommend everybody to switch blindly. Sites with low db activity and traffic won't see any difference.