Alvaro Herrera <[EMAIL PROTECTED]> writes: > Greg Stark wrote: >> I'm beginning to think just excluding the hint bits would be simpler and >> safer. If we're double buffering then it might be possible to do that >> pretty cheaply. Copy the whole buffer with memcpy then loop through the >> line pointers unsetting the hint bits. Then do the crc. Though that would >> prevent us from doing "zero-copy" crc by doing it in the copy.
> The downside to this idea is that we need to create a copy of the page > and call those routines when we read the page in, too. Ugh. The cost on write was bad enough, but paying it on read is a lot worse ... regards, tom lane -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers