How much of this problem can be attributed by the fact that repalloc has to copy the data from the old array into the new one? If it's large, perhaps we could solve it by replicating the trick we use for InvalidationChunk. It'd be a bit messy, but the mess would be pretty well contained, I think.
-- Álvaro Herrera http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
