On Mon, Dec 15, 2008 at 12:30 PM, Alvaro Herrera <alvhe...@commandprompt.com> wrote: >> How hard would it be to just take an exclusive lock on the page when setting >> all these hint bits? > > I guess it will be intolerably slow then. If we were to say "we have > CRC now, but if you enable it you have 1% of the performance" we will > get laughed at.
Well, Oracle does tell users that enabling full CRC checking will cost ~5% performance overhead, which is reasonable to me. I'm not pessimistic enough to think we'd be down to 1% the performance of a non-CRC enabled system, but the locking overhead would probably be fairly high. The problem is, at this point, we don't really know what the impact would be either way :( -- Jonah H. Harris, Senior DBA myYearbook.com -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
