Ruby on rails log file size too large

问题

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, can I get rid of the log?thanks

回答1:

you can just delete the file!
Rails will create a new log if one doesn't exist.
Obviously save / backup the file if it's important, but usually it's not.
You can also zip the backuped up file (and then delete the source) if you want to keep it on the same drive but still save space.

To automatically rotate log files (the best long-term solution) use log rotate as described here:

Ruby on Rails production log rotation

then you can set it and forget it!

To actually change what gets logged see:

http://dennisreimann.de/blog/silencing-the-rails-log-on-a-per-action-basis/

回答2:

The log folder of your Rails application holds three log files corresponding to each of the standard environments. Log files can grow very large over time. A rake task is provided to allow the easy clearing of the log files.

rake log:clear
# Truncates all *.log files in log/ to zero bytes 
# Specify which logs with LOGS=test,development,production

回答3:

According to the documentation, if you want to limit the size of the log folder, put this in your 'development.rb'-file:

config.logger = ActiveSupport::Logger.new(config.paths['log'].first, 1, 50 * 1024 * 1024)

With this, your log files will never grow bigger than 50Mb. You can change the size to your own preference. The ‘1’ in the second parameter means that 1 historic log file will be kept, so you’ll have up to 100Mb of logs – the current log and the previous chunk of 50Mb.

回答4:

You may want to use logrotate. Have a look at the answer to this question: Ruby on Rails production log rotation.

回答5:

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

回答6:

Yes, You can using syntax like this:

config.logger = ActiveSupport::Logger.new(config.log_file, num_of_file_to_keep, num_of_MB*1024*1024)

Example:

config.logger = ActiveSupport::Logger.new(config.log_file, 2, 20*1024*1024)

It not only using for Rails log, you can using log file of any services run with rails, such as: rpush log, ...

回答7:

config.logger = ActiveSupport::Logger.new(nil) does the trick and completely disables logging to a file (console output is preserved).

回答8:

A fair compromise, in an initializer:

Rake::Task['log:clear'].invoke if Rails.env.development? || Rails.env.test?

来源：https://stackoverflow.com/questions/7784057/ruby-on-rails-log-file-size-too-large