[HACKERS] must synchronous_standby_names be set?
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: 25.2.6.1. 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 ) Two questions: 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? Thank you, Erik Rijkers -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
Re: [HACKERS] must synchronous_standby_names be set?
On Fri, Jul 1, 2011 at 2:42 PM, Erik Rijkers e...@xs4all.nl wrote: Two questions: 1. How to query a session to make absolutely sure that replication is actually synchronous? Check synchronous_standby_names and synchronous commit for appropriate values. 2. Does sync-repl really need synchronous_standby_names to be set? Yes Unset = synchronise with zero servers = asynchronous -- Simon Riggs http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training Services -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
Re: [HACKERS] must synchronous_standby_names be set?
Simon Riggs si...@2ndquadrant.com writes: On Fri, Jul 1, 2011 at 2:42 PM, Erik Rijkers e...@xs4all.nl wrote: Two questions: 1. How to query a session to make absolutely sure that replication is actually synchronous? Check synchronous_standby_names and synchronous commit for appropriate values. also check pg_stat_replication -- Jaime Casanova www.2ndQuadrant.com Professional PostgreSQL Soporte 24x7, desarrollo, capacitación y servicios -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
