Re: Replication stopped on 9.0.2 after making change to conf file

From: Lonni J Friedman <netllama(at)gmail(dot)com>
To: akp geek <akpgeek(at)gmail(dot)com>
Cc: pgsql-general <pgsql-general(at)postgresql(dot)org>
Subject: Re: Replication stopped on 9.0.2 after making change to conf file
Date: 2013-03-09 16:14:09
Message-ID: CAP=oouGDa5dh1bGrDRcksoPve63jGMoUkEwzOV7aLZSMXi3=bg@mail.gmail.com
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It sounds like all you did was setup the slave from scratch with a
fresh base backup, without understanding or debugging what caused
everything to break. Clearly whatever was wrong on March 5 is still
wrong, and nothing has been fixed. The first step in debugging this
problem is to look at and/or post the log content (from both the
master & slave) from the time when this stopped working (march 5).

On Fri, Mar 8, 2013 at 11:06 PM, akp geek <akpgeek(at)gmail(dot)com> wrote:
> What I noticed is...
>
> our streaming stopped on march 5th. I restarted the process today.
> However the new data is syncing correctly. But the data for these dates
> between 5th and today is not syncing. Is there some thing wrong that I did.
>
> here is what I did.
>
> 1.. created base backup
> 2. Took the data directory on to the slave
> 3. stopped the base backup on master
> 4. started the db on slave
>
> Appreciate your help.
>
> Regards
>
>
>
> On Sat, Mar 9, 2013 at 12:52 AM, akp geek <akpgeek(at)gmail(dot)com> wrote:
>>
>> Thanks a lot. I started the replication. It became very slow. It is taking
>> long time to sync the masters data onto slave. Is there a way to find what's
>> causing the issue?
>>
>> Regards
>>
>>
>>
>> On Fri, Mar 8, 2013 at 12:06 PM, John Laing <john(dot)laing(at)gmail(dot)com> wrote:
>>>
>>> I'm not sure about the existence of any standard scripts, but we have a
>>> pair of checks running periodically on the backup server.
>>>
>>> This shouldn't return anything:
>>> tail -3 /var/log/postgresql/postgresql-9.1-main.log | grep FATAL
>>>
>>> And this should return something:
>>> ps -u postgres -o cmd | grep "postgres: wal receiver process streaming"
>>>
>>> These have worked very reliably for many months.
>>>
>>> -John
>>>
>>>
>>> On Fri, Mar 8, 2013 at 11:53 AM, akp geek <akpgeek(at)gmail(dot)com> wrote:
>>>>
>>>> I got it fixed.
>>>>
>>>> What I did was
>>>>
>>>> $ psql -c "SELECT pg_start_backup('label', true)"
>>>> $ rsync -a ${PGDATA}/ standby:/srv/pgsql/standby/ --exclude
>>>> postmaster.pid
>>>> $ psql -c "SELECT pg_stop_backup()"
>>>>
>>>> It took a while a to catch up the data.
>>>>
>>>>
>>>> One question I have , are there any scripts to monitor the status of the
>>>> replciation. so that I can be little proactive
>>>>
>>>>
>>>> Regards
>>>>
>>>>
>>>>
>>>> On Thu, Mar 7, 2013 at 9:25 PM, Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com>
>>>> wrote:
>>>>>
>>>>> On Thu, Mar 7, 2013 at 5:28 PM, akp geek <akpgeek(at)gmail(dot)com> wrote:
>>>>> > Hi all -
>>>>> >
>>>>> > Recently made change on our primary database
>>>>> >
>>>>> > default_text_search_config = 'pg_catalog.simple' .
>>>>> > After that
>>>>> > the replication is stopped. Can you please help me ? how to fix the
>>>>> > issue. I
>>>>> > am sure I made the change on the slave also.
>>>>> >
>>>>> > How can I start the replication and catch up the data. Thanks for
>>>>> > your time.
>>>>>
>>>>> What are you seeing in your slony and / or postgresql logs, if
>>>>> anything?

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