Heroku / Memcache / Rack :: Cache Stats

我试图将我的大脑包裹在Rack :: Cache，Rails 3.2，Memcache和Heroku中。 我想我已经完成了所有工作，如下所述： http ： //myownpirateradio.com/2012/01/01/getting-heroku-cedar-and-rails-3-1-asset-pipeline-to-play -nicely在一起/

总而言之，我不确定Memcached是否真的在做它应该做的事情。 有没有办法在Memcached上获取统计信息或查看Memcached是否缓存了请求？ 我将当前时间放在页面上，并且可以看到它正在缓存（标题看起来也很好），但我怎么知道它与Memcached一起使用，而不是文件存储？

谢谢。

Answer 1

您可以通过执行以下操作获取memcached的统计信息：

$ heroku run console Running console attached to terminal... up, run.1 Loading production environment (Rails 3.1.3) irb(main):001:0> Rails.cache.stats Dalli/SASL authenticating as app590983%40heroku.com Dalli/SASL: Authenticated => {"mc5.ec2.northscale.net:11211"=>{"evictions"=>"0", "curr_items"=>"627", "total_items"=>"1257", "bytes"=>"2294318", "reclaimed"=>"0", "engine_maxbytes"=>"5242880", "bucket_conns"=>"2", "pid"=>"319", "uptime"=>"6710022", "time"=>"1330731177", "version"=>"1.4.4_207_g19c6b9e", "libevent"=>"1.4.11-stable", "pointer_size"=>"64", "rusage_user"=>"34354.590000", "rusage_system"=>"31381.520000", "daemon_connections"=>"10", "curr_connections"=>"1211", "total_connections"=>"14127919", "connection_structures"=>"1764", "cmd_get"=>"9476", "cmd_set"=>"1257", "cmd_flush"=>"0", "auth_cmds"=>"24", "auth_errors"=>"0", "get_hits"=>"8093", "get_misses"=>"1383", "delete_misses"=>"0", "delete_hits"=>"0", "incr_misses"=>"0", "incr_hits"=>"0", "decr_misses"=>"0", "decr_hits"=>"0", "cas_misses"=>"0", "cas_hits"=>"0", "cas_badval"=>"0", "bytes_read"=>"21983909", "bytes_written"=>"85267718", "limit_maxbytes"=>"67108864", "rejected_conns"=>"0", "threads"=>"4", "conn_yields"=>"0"}} 

PS：我认为您可能需要使用Dalli gem来实现这一点，但无论如何这都是推荐的客户端。

您还可以运行Rails.cache.class以查看哪个后端是Rails使用。