On Nov 24, 2010, at 4:05 PM, Andres Freund <and...@anarazel.de> wrote: >>> >>> Won't this just cause loads of additional pagefaults after fork() when >>> those pages are used the first time and then a second time when first >>> written to (to copy it)? >> >> Aren't we incurring those page faults anyway, for whatever memory >> palloc is handing out? The heap is no different from bss; we just >> move the pointer with sbrk(). > Yes, but only once. Also scrubbing a page is faster than copying it... (and > there were patches floating around to do that in advance, not sure if they > got > integrated into mainline linux)
I'm not following - can you elaborate? ...Robert -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
