I'm testing synchronous replication on 9.2devel - both instances are on a single machine.
The primary shows synchronous_commit = on
and synchronous_standby_names = ''.
The standby receives updates fine.
Now, does the 'synchronous_commit = on' absolutely mean that the session is sync-replicating?
Could it be non-synchronously replicating?
If so, this information in the manual seems wrong:
184.108.40.206. Basic Configuration
Once streaming replication has been configured, configuring synchronous replication requires only
one additional configuration step: synchronous_standby_names must be set to a non-empty value.
( the 'must be set' part )
1. How to query a session to make absolutely sure that replication is actually synchronous?
2. Does sync-repl really need synchronous_standby_names to be set?
Grokbase › Groups › PostgreSQL › pgsql-hackers › July 2011