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On 13-Feb-2013, at 19:05, Heikki Linnakangas <hlinnakan...@vmware.com> wrote: > On 13.02.2013 15:31, Alexander Korotkov wrote: >> On Wed, Feb 13, 2013 at 4:51 PM, Greg Stark<st...@mit.edu> wrote: >> >>> Heikki was talking about a generic WAL record type that would just >>> store a binary delta between the version of the block when it was >>> locked and when it was unlocked. That would handle any extension >>> cleanly as far as data modification goes as long as the extension was >>> working through our buffer manager. It seems like an attractive idea >>> to me. >> >> It will, for sure, works well when atomic page changes are enough for us. >> However, some operations, for example, page splits, contain changes in >> multiple pages. Replaying changes in only some of pages is not fair. Now, >> it's hard for me to imagine how to generalize it into generic WAL record >> type. > > You could have a generic WAL record that applies changes to multiple pages > atomically. > > Sounds extremely interesting and fun.How would we go about implementing it? Atri -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
