rails/rails — pull request #6754 by kennyj (2012-06-16 15:37:17+00:00)
Title: 【PostgreSQL】 Change default minimum log level to warning.

If we migrate database on postgresql, we have many notice messages: e.g.

```
NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index
```

I've already known `min_messages` option, but I guess that many people don't know this option.
So I guess we should change default min_messages to `warning`　for convenience.

WDYT?