Simon Riggs wrote:
Issues (2) and (3) would go away entirely if both standby and primary
always had the same xmin value as a system-wide setting. i.e. the
standby and primary are locked together at their xmins. Perhaps that was
Heikki's intention in recent suggestions?
No, I only suggested that as an optional optimization. We can't rely on
it, because the queries on standby should still work correctly if the
connection to primary is lost for some reason, or if the primary decides
not to honor standby's xmin, perhaps to avoid the usual issues with
long-running-transactions.
--
Heikki Linnakangas
EnterpriseDB http://www.enterprisedb.com
--
Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-hackers
