如何使用capistrano清除memcache？

gem install capistrano

gem install capistrano-memcached

require 'capistrano/memcached'

namespace :deploy do
  desc "Flush Memcached"
  task :flush_memcached do
    on roles(:app) do
      within release_path do
        with rails_env: fetch(:rails_env) do
          execute :rake, "memcached:flush"
        end
      end
    end
  end
end

cap production deploy:flush_memcached