postgreSQL notes

Django supports PostgreSQL 9.0 and higher. It requires the use of Psycopg2 2.0.9 or higher.

Optimizing postgreSQL's configuration

Django needs the following parameters for its database connections:

• client_encoding: 'UTF8',

• default_transaction_isolation: 'read committed' by default, or the value set in the connection options (see here),

• timezone: 'UTC' when USE_TZ is True, value of TIME_ZONE otherwise.

If these parameters already have the correct values, Django won't set them for every new connection, which improves performance slightly. You can configure them directly in postgresql.conf or more conveniently per database user with ALTER ROLE.

Django will work just fine without this optimization, but each new connection will do some additional queries to set these parameters.

Isolation level

Like PostgreSQL itself, Django defaults to the READ COMMITTED isolation level. If you need a higher isolation level such as REPEATABLE READ or SERIALIZABLE, set it in the OPTIONS part of your...