On Mon, Nov 5, 2012 at 9:14 PM, Tom Lane <t...@sss.pgh.pa.us> wrote: > Bruce Momjian <br...@momjian.us> writes: > > Magnus reported that a customer with a million tables was finding > > pg_upgrade slow. > > You sure there's not an O(N^2) issue in there somewhere?
> > I don't see anything unsafe about having pg_upgrade use > > synchronous_commit=off. > > No objection, but this seems unlikely to be better than linear speedup, > with a not-terribly-large constant factor. > > BTW, does pg_upgrade run pg_restore in --single-transaction mode? > That would probably make synchronous_commit moot, at least for that > step. > It doesn't use pg_restore at all - it uses the dump from pg_dumpall, which you can't reload with pg_restore. -- Magnus Hagander Me: http://www.hagander.net/ Work: http://www.redpill-linpro.com/
