On Fri, Sep 2, 2016 at 07:50:58AM +0530, Robert Haas wrote:
> But if you have BOTH features, then you can set
> synchronous_standby_names to require an ACK from *every* standby, and
> you can set synchronous_commit=remote_apply so that you wait for WAL
> to be applied, not just fsync'd, and now you are guaranteed that
> whenever you make a change on the master and then read it back from
> any one of your read-replicas, it will be there! And that, IMHO, is
> pretty cool.
Are we clear on how useful this will be because of the delay in applying
WAL, particularly for when conflicting read-only queries are running?
--
Bruce Momjian <bruce@momjian.us> http://momjian.us
EnterpriseDB http://enterprisedb.com
+ As you are, so once was I. As I am, so you will be. +
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