On Mon, Apr 21, 2014 at 8:03 PM, Torsten Förtsch <torsten.foert...@gmx.net>wrote:
> Hi, > > just out of curiosity, what's the difference between "streaming" and > "catchup" state in pg_stat_replication. > > According to the documentation this field is "Current WAL sender state". > But that does not tell me anything. > When a standby connects for the first time to a primary, it is not yet synchronized, this is the "catchup" phase. Once the lag between the standby and the master is reduced to zero for the first time, replication state changes to "streaming". -- Michael
