stats() — MemCache — Ruby on Rails 2.2.3

stats()

Returns statistics for each memcached server. An explanation of the statistics can be found in the memcached docs:

code.sixapart.com/svn/memcached/trunk/server/doc/protocol.txt

Example:

>> pp CACHE.stats
{"localhost:11211"=>
  {"bytes"=>4718,
   "pid"=>20188,
   "connection_structures"=>4,
   "time"=>1162278121,
   "pointer_size"=>32,
   "limit_maxbytes"=>67108864,
   "cmd_get"=>14532,
   "version"=>"1.2.0",
   "bytes_written"=>432583,
   "cmd_set"=>32,
   "get_misses"=>0,
   "total_connections"=>19,
   "curr_connections"=>3,
   "curr_items"=>4,
   "uptime"=>1557,
   "get_hits"=>14532,
   "total_items"=>32,
   "rusage_system"=>0.313952,
   "rusage_user"=>0.119981,
   "bytes_read"=>190619}}
=> nil

Source

# File activesupport/lib/active_support/vendor/memcache-client-1.5.1/memcache.rb, line 467
  def stats
    raise MemCacheError, "No active servers" unless active?
    server_stats = {}

    @servers.each do |server|
      sock = server.socket
      raise MemCacheError, "No connection to server" if sock.nil?

      value = nil
      begin
        sock.write "stats\r\n"
        stats = {}
        while line = sock.gets do
          raise_on_error_response! line
          break if line == "END\r\n"
          if line =~ /\ASTAT ([\w]+) ([\w\.\:]+)/ then
            name, value = $1, $2
            stats[name] = case name
                          when 'version'
                            value
                          when 'rusage_user', 'rusage_system' then
                            seconds, microseconds = value.split(/:/, 2)
                            microseconds ||= 0
                            Float(seconds) + (Float(microseconds) / 1_000_000)
                          else
                            if value =~ /\A\d+\Z/ then
                              value.to_i
                            else
                              value
                            end
                          end
          end
        end
        server_stats["#{server.host}:#{server.port}"] = stats
      rescue SocketError, SystemCallError, IOError => err
        server.close
        raise MemCacheError, err.message
      end
    end

    server_stats
  end

Defined in activesupport/lib/active_support/vendor/memcache-client-1.5.1/memcache.rb line 467 · View on GitHub · Improve this page · Find usages on GitHub

Defined in MemCache

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