On Wed, Dec 18, 2013 at 3:39 PM, Sergey Konoplev <gray.ru@gmail.com> wrote:
On Wed, Dec 18, 2013 at 11:26 AM, Joe Van Dyk <joe@tanga.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.