On 2016-08-31 23:40:46 +0200, Tomas Vondra wrote:
> It's an improvement (and it's pretty much exactly what I proposed
> upthread). But it does not solve the problems with pg_statistic for
> example (each backend needs it's own statistics. So we'd either bloat
> the pg_statistic (if we manage to solve the problem that the table has
> the same oid in all backends), or we would need in-memory tuples (just
> like discussed in the thread so far).
Creating a session private version of pg_statistic would be fairly
simple.