On Wed, Jan 22, 2014 at 10:08 PM, Jim Nasby <j...@nasby.net> wrote: > > Probably more useful is the case of index scans; if we pre-read more data > from the index we could hand the kernel a list of base relation blocks that > we know we'll need.
Actually, I've already tried this. The most important part is fetching heap pages, not index. Tried that too. Currently, fadvising those pages works *in detriment* of physically correlated scans. That's a kernel bug I've reported to LKML, and I could probably come up with a patch. I've just never had time to set up the testing machinery to test the patch myself. -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
