PG_CONF parameters optimization

[cayetanobv]

We need to review PG_CONF parameters to optimize performance in a normal database operating context.

PG_CONF parameters are here

[cayetanobv]

Logs parameters will be the first to change...

[alasarr]

I agree. I think it's a good starting point. I'll increase the checkpoint to 10min and set the log by default to ddl.

[josemazo]

Related: #42 (comment)