About replacing PostgreSQL instance

[Oscar Calderon <ocalderon@xxxxxxxxxxxxxxxxxxxxxxxxx>]

Hi to all, i wanna ask you a piece of advice. The company where i work is bringing maintenance service of PostgreSQL to another company, and currently they have installed PostgreSQL 9.1.1, and they want to move to 9.3 version when it will come out. So, because the difference of versions, and because it was installed by compiling it (using source code), and because the 9.1.1 installation is in a different directory than the default, they decided to replace 9.1.1 version with 9.3 (no upgrade, but replace it). 

Currently, they only have one database in production of 2.2 GB with some procedures and triggers. So, my plan to execute this database installation is the next:

1. Install PostgreSQL 9.3 from postgresql repository (yum.postgresql.org) with a different port to avoid interrupt the production PostgreSQL instance operation
2. Tune the database parameters in postgresql.conf, also create the same rules in pg_hba as the production instance, configure log and so on.
3. At the end of the operations day, create a backup of the production database and then restore it into the new instance
4. Test the new instance with the PHP applications that use it and verify that all is in order
   
5. Stop the old instance and change the port to another port, then change the port of the new instance to 5432 in order to avoid change the network configuration, permissions and so on.

But really is the first time that i do that, so i don't know if i'm missing something or there's something wrong about i'm planning to do, so i will appreciate very much if you can guide me about what steps i have to do exactly and considerations during this process.

Regards.

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Oscar Calderon
Analista de Sistemas
Soluciones Aplicativas S.A. de C.V.
www.solucionesaplicativas.com
Cel. (503) 7741 7850