Re: Streaming Replication Randomly Locking Up - Mailing list pgsql-general

I've never seen this happen.  Looks like you might be using 9.1?  Are
you up to date on all the 9.1.x releases?

Do you have just 1 slave syncing from the master?
Which OS are you using?
Did you verify that there aren't any network problems between the
slave & master?
Or hardware problems (like the NIC dying, or dropping packets)?

On Thu, Aug 15, 2013 at 11:07 AM, Andrew Berman <rexxe98@gmail.com> wrote:
> Hello,
>
> I'm having an issue where streaming replication just randomly stops working.
> I haven't been able to find anything in the logs which point to an issue,
> but the Postgres process shows a "waiting" status on the slave:
>
> postgres  5639  0.1 24.3 3428264 2970236 ?     Ss   Aug14   1:54 postgres:
> startup process   recovering 000000010000053D0000003F waiting
> postgres  5642  0.0 21.4 3428356 2613252 ?     Ss   Aug14   0:30 postgres:
> writer process
> postgres  5659  0.0  0.0 177524   788 ?        Ss   Aug14   0:03 postgres:
> stats collector process
> postgres  7159  1.2  0.1 3451360 18352 ?       Ss   Aug14  17:31 postgres:
> wal receiver process   streaming 549/216B3730
>
> The replication works great for days, but randomly seems to lock up and
> replication halts.  I verified that the two databases were out of sync with
> a query on both of them.  Has anyone experienced this issue before?
>
> Here are some relevant config settings:
>
> Master:
>
> wal_level = hot_standby
> checkpoint_segments = 32
> checkpoint_completion_target = 0.9
> archive_mode = on
> archive_command = 'rsync -a %p foo@foo:/var/lib/pgsql/9.1/wals/%f
> </dev/null'
> max_wal_senders = 2
> wal_keep_segments = 32
>
> Slave:
>
> wal_level = hot_standby
> checkpoint_segments = 32
> #checkpoint_completion_target = 0.5
> hot_standby = on
> max_standby_archive_delay = -1
> max_standby_streaming_delay = -1
> #wal_receiver_status_interval = 10s
> #hot_standby_feedback = off
>
> Thank you for any help you can provide!
>
> Andrew
>

--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
L. Friedman                                    netllama@gmail.com
LlamaLand                       https://netllama.linux-sxs.org