Re: Replication failed after stalling

On Wed, Dec 18, 2013 at 3:39 PM, Sergey Konoplev <gray(dot)ru(at)gmail(dot)com> wrote:

> On Wed, Dec 18, 2013 at 11:26 AM, Joe Van Dyk <joe(at)tanga(dot)com> wrote:
> > I'm running Postgresql 9.3. I have a streaming replication server.
> Someone
> > was running a long COPY query (8 hours) on the standby which halted
> > replication. The replication stopped at 3:30 am. I canceled the
> long-running
> > query at 9:30 am and replication data started catching up.
>
> What do you mean by "COPY on the standby halted replication"?
>

If I run "COPY (select * from complicate_view) to stdout" on the standby,
I've noticed that sometimes halts replication updates to the slave.

For example, that's happening right now and "now() -
pg_last_xact_replay_timestamp()" is 22 minutes. There's many transactions
per second being committed on the master. Once that query is canceled, the
slave catches up immediately.

Joe