Re: Forcing WAL flush - Mailing list pgsql-performance

Le 2013-01-07 à 16:49, james a écrit :

> Is there a way to force a WAL flush so that async commits (from other connections) are flushed, short of actually
updatinga sacrificial row? 
>
> Would be nice to do it without generating anything extra, even if it is something that causes IO in the checkpoint.
>
> Am I right to think that an empty transaction won't do it, and nor will a transaction that is just a NOTIFY?

Does pg_start_backup() trigger a full WAL flush?

http://www.postgresql.org/docs/9.2/static/continuous-archiving.html#BACKUP-LOWLEVEL-BASE-BACKUP
http://www.postgresql.org/docs/9.2/static/functions-admin.html#FUNCTIONS-ADMIN-BACKUP-TABLE

Bye,
François