Robert Haas <robertmh...@gmail.com> writes: > An obvious problem is that, if the abort rate is significantly > different from zero, and especially if the aborts are randomly mixed > in with commits rather than clustered together in small portions of > the XID space, the CLOG rollup data would become useless.
Yeah, I'm afraid that with N large enough to provide useful acceleration, the cases where you'd actually get a win would be too thin on the ground to make it worth the trouble. 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