[book] Improve PostgreSQL configuration section
* Do not advice for specific PostgreSQL version (point to meta-packages if
available in Linux distros);
* First mention packages from Linux distros, put the link to official postgres
documentation at the end;
Closes #2725302.
.. -*- coding: utf-8 -*-
RQL logs
========
You can configure the *CubicWeb* instance to keep a log
of the queries executed against your database. To do so,
edit the configuration file of your instance
``.../etc/cubicweb.d/myapp/all-in-one.conf`` and uncomment the
variable ``query-log-file``::
# web instance query log file
query-log-file=/tmp/rql-myapp.log