Josh Berkus <[EMAIL PROTECTED]> writes: >> If we had a portable way >> of preventing the kernel from caching the same page, it would make more >> sense to run with large shared_buffers.
> Really? I thought we wanted to move the other way ... that is, if we could > get over the portability issues, eliminate shared_buffers entirely and rely > completely on the OS cache. That seems unlikely to happen: there are cache-coherency problems if you don't do your page-level access through shared buffers. Some have suggested using mmap access to the data files in place of shared memory, but that introduces a slew of issues of its own. It might happen but I'm not holding my breath. regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 8: explain analyze is your friend