Ruby on rails log file size too large

Question

I stumbled to learn that my rails3.1 log file is super large, around 21mb. Is this, in terms of size normal? What the log file would like in the production environment? Besides,

Answer 1

I automatically clear the logs in development on each server start with config/initializers/clear_development_log.rb:

if Rails.env.development?
  `rake log:clear`
end