Zdenek Kotala <[EMAIL PROTECTED]> writes: > It does not solve problems for example with TOAST tables. If chunks does not > fit > on a new page layout one of the chunk tuple have to be moved to free page. It > means you get a lot of pages with ~2kB of free unused space. And if max chunk > size is different between version you got another problem as well.
> There is also idea to change compression algorithm for 8.4 (or offer more > varinats). It also mean that you need to understand old algorithm in a new > version or you need to repack everything on old version. I don't have any problem at all with the idea that in-place update isn't going to support arbitrary changes of parameters, such as modifying the toast chunk size. In particular anything that is locked down by pg_control isn't a problem. 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