On Fri, Jul 27, 2018 at 12:05 PM, Ioseph Kim <pgsql...@postgresql.kr> wrote: > I want to build one master & multi slave environments to use physical > replication. > Slave nodes have low hardware spec, so I changed max_connection server > parameters, and try start slave node. > But I could not start slave nodes, > because CheckRequiredParameterValues function (in > src/backend/access/transam/xlog.c) reject to set less values then master’s > values. > > It is maybe, > This concept is base on some slave node can be promte master.
No, it's because the machinery that computes MVCC snapshots on slaves relies on max_connections being set high enough. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company
