Re: [HACKERS] Re: new high availability feature for the system withboth asynchronous and synchronous replication

From: Robert Haas [mailto:robertmhaas@gmail.com]
>> This patch enables walsender for async to wait until walsender for sync confirm
>> WAL is flashed to Disk. This feature is activated when GUC parameter
>> "async_walsender_delay" is set on.
> So this new option makes asynchronous replication synchronous?
No, this feature only delays the start of WAL transfer of asynchronous replication. 
Asynchronous replication on this feature does not wait for response from standby. 
(This behavior does not be changed, so it is the same as before. )

Regards, 
Daisuke Higuchi