title: Redmine starts slow on Linux
body: <p>How do I get Redmine to start fast on Linux (CentOS)?</p>
  
  <p>I upgraded all last week: latest Redmine, Ruby, Passenger, etc...</p>
  
  <p>I tried about all I could find in the Redmine forum and other posts of getting it to speed up faster, that is: when requesting the Redmine website after a few hours being idle, it starts slow, but then it's blazing fast.</p>
  
  <p>I am using Apache web server with Passenger. Below my current apache config, please some advice, as I am out of ideas:</p>
  
  <pre><code>LoadModule passenger_module /usr/local/rvm/gems/ruby-1.9.3-p448/gems/passenger-4.0.19/buildout/apache2/mod_passenger.so
  PassengerRoot /usr/local/rvm/gems/ruby-1.9.3-p448/gems/passenger-4.0.19
  PassengerDefaultRuby /usr/local/rvm/wrappers/ruby-1.9.3-p448/ruby
  
  # Refs:
  # http://stackoverflow.com/questions/8235309/redmine-perfomance-inconsistency
  # http://www.redmine.org/boards/2/topics/31783
  # This option should be 0, but has an issue: https://code.google.com/p/phusion-passenger/issues/detail?id=904
  PassengerPoolIdleTime 999999
  PassengerMinInstances 2
  PassengerHighPerformance on
  PassengerPreStart https://myhost/redmine
  
  PassengerMaxPoolSize 5
  PassengerMaxInstancesPerApp 4
  PassengerStatThrottleRate 10
  RailsAppSpawnerIdleTime 0
  PassengerMaxPreloaderIdleTime 0
  
  RailsBaseURI /redmine
  RailsEnv production
  </code></pre>