Firstly, I apologise for the delay in replying to you.

>On which of the database clusters are you seeing the 4 template0
databases?
template0 looks the same on both the master and slave,

=======================================================
$ psql -U user -l -h master | grep template0
 template0                                      | postgres   | UTF8     | C
      | C          | =c/postgres          +
 template0                                      | postgres   | UTF8     | C
      | C          | =c/postgres          +
 template0                                      | postgres   | UTF8     | C
      | C          | =c/postgres          +
 template0                                      | postgres   | UTF8     | C
      | C          | =c/postgres          +
$ psql -U user -l -h slave1 | grep template0
 template0                                      | postgres   | UTF8     | C
      | C          | =c/postgres          +
 template0                                      | postgres   | UTF8     | C
      | C          | =c/postgres          +
 template0                                      | postgres   | UTF8     | C
      | C          | =c/postgres          +
 template0                                      | postgres   | UTF8     | C
      | C          | =c/postgres          +
$ psql -U user -l -h slave2 | grep template0
 template0                                      | postgres   | UTF8     | C
      | C          | =c/postgres          +
 template0                                      | postgres   | UTF8     | C
      | C          | =c/postgres          +
 template0                                      | postgres   | UTF8     | C
      | C          | =c/postgres          +
 template0                                      | postgres   | UTF8     | C
      | C          | =c/postgres          +
=======================================================


>How are the databases created?

We create database at createdb command.
ex) createdb -O user -E UTF8 --lc-ctype ja_JP.UTF8  -T template0 <dbname>


Best regards,
Kazuaki Fujikura


2016-02-11 4:41 GMT+09:00 Adrian Klaver <adrian.kla...@aklaver.com>:

> On 02/10/2016 07:19 AM, Kazuaki Fujikura wrote:
>
>> Thank you for your comments.
>>
>>  >Can you explain what your replication set up is?
>>
>> Streaming Replication.
>> =>
>> master----slave1 (async)
>> master----slave2 (async)
>>
>>  >So are you doing the below on the master, the slaves or all?
>> =>master
>>
>> Our current plan at this moment is
>> - Upgrade 9.1.19 from 9.1.6 at the end of March at our scheduled
>> maintenance
>> - Export and import pg_dump files ( to eliminate the effect of template0
>> and xid, which are all reset at import)
>>
>> We are still afraid that it is too late (as we still have 4 strange
>> template0 files). So, if you have any ideas/suggestions which we can try
>> before scheduled maintenance, that is much appreciated.
>>
>
> On which of the database clusters are you seeing the 4 template0 databases?
>
> From a previous post:
>
> "We have more than 1100 databases and create new database every day
> whenever new customer comes. .."
>
> How are the databases created?
>
>
>
>>
>> Best regards,
>> Kazuaki Fujikura
>>
>>
>
> --
> Adrian Klaver
> adrian.kla...@aklaver.com
>

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