gistfile1.rb

# To configure memcached to be used
# /config/environment.rb

config.cache_store = :mem_cache_store

# Object Store cache commands

Rails.cache.read
Rails.cache.write
Rails.cache.fetch
Rails.cache.delete
Rails.cache.exist?
Rails.cache.increment
Rails.cache.decrement
Rails.cache.clear

# Example of using expires_in 

def self.recent
  Rails.cache.fetch("recent_posts", :expires_in => 30.minutes) do
    self.find(:all, :limit => 10)
  end
end

# Using cache_key properly to give good cache keys

<% cache(post) do %>
   <!-- Data related to this post -->
<% end %>

# A more realistic cache key

<% cache([post, user, "sidebar"]) do %>
   <!-- Data related to this user and this post -->
<% end %>