On 2018-01-12 07:51:34 -0500, Robert Haas wrote: > On Thu, Jan 11, 2018 at 11:01 PM, Thomas Munro > <thomas.mu...@enterprisedb.com> wrote: > > Are you saying we should do the work now to create a per-transaction > > DSM segment + DSA area + thing that every backend attaches to? > > No, I was just thinking you could stuff it into the per-parallel-query > DSM/DSA. But... > > > I didn't think creating backend local hash tables would be a problem > > because it's a vanishingly rare occurrence for the hash table to be > > created at all (ie when you've altered an enum), and if created, to > > have more than a couple of entries in it. > > ...this is also a fair point.
OTOH, it seems quite likely that we'll add more transaction-lifetime shared data (e.g. combocid), so building per-xact infrastructure actually seems like a good idea. Greetings, Andres Freund
