Don't record most HTTP request and response headers in the APM, except for the User-Agent, Referer, Save-Data, X-Forwarded-For, Accept-Language, and Content-Type headers. Recording every HTTP header for every request takes up a lot of space and most of them aren't very useful.
Config
This directory contains configuration files for Danbooru.
To configure your Danbooru instance, copy danbooru_default_config.rb to danbooru_local_config.rb and edit it. See danbooru_default_config.rb for details.
The only file here that end users need to be concerned about is danbooru_default_config.rb. The rest of the files here are internal Rails-related configuration files that end users shouldn't need to edit.