On Thu, May 30, 2013 at 09:47:22AM -0400, Robert Haas wrote: > Well, as Heikki points out, I think that's unacceptably dangerous. > Loss or corruption of a single visibility map page means possible loss > of half a gigabyte of data. > > Also, if we go that route, looking at the visibility map is no longer > an optimization; it's essential for correctness. We can't decide to > skip it when it seems expensive, for example, as Jeff was proposing.
Isn't the visibility map already required for proper return results as we use it for index-only scans. I think the optimization-only ship has sailed. -- Bruce Momjian <br...@momjian.us> http://momjian.us EnterpriseDB http://enterprisedb.com + It's impossible for everything to be true. + -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
