On Fri, Jan 27, 2012 at 4:05 PM, Jeff Janes <jeff.janes@gmail.com> wrote:
> Also, I think the general approach is wrong. The only reason to have
> these pages in shared memory is that we can control access to them to
> prevent write/write and read/write corruption. Since these pages are
> never written, they don't need to be in shared memory. Just read
> each page into backend-local memory as it is needed, either
> palloc/pfree each time or using a single reserved block for the
> lifetime of the session. Let the kernel worry about caching them so
> that the above mentioned reads are cheap.
right -- exactly. but why stop at one page?
merlin