Memcached 统计(stats)

• 

  Telnet stats

  Memcached stats命令用于返回服务器统计信息，例如PID，版本，连接等。

  Memcached stats命令的基本语法如下所示-

  
  stats
  

  例

  
  stats
  STAT pid 1120
  STAT uptime 15316
  STAT time 1605073360
  STAT version 1.4.15
  STAT libevent 2.0.21-stable
  STAT pointer_size 64
  STAT rusage_user 0.086050
  STAT rusage_system 0.172100
  STAT curr_connections 10
  STAT total_connections 11
  STAT connection_structures 11
  STAT reserved_fds 20
  STAT cmd_get 0
  STAT cmd_set 2
  STAT cmd_flush 0
  STAT cmd_touch 0
  STAT get_hits 0
  STAT get_misses 0
  STAT delete_misses 0
  STAT delete_hits 0
  STAT incr_misses 0
  STAT incr_hits 0
  STAT decr_misses 0
  STAT decr_hits 0
  STAT cas_misses 0
  STAT cas_hits 0
  STAT cas_badval 0
  STAT touch_hits 0
  STAT touch_misses 0
  STAT auth_cmds 0
  STAT auth_errors 0
  STAT bytes_read 93
  STAT bytes_written 48
  STAT limit_maxbytes 67108864
  STAT accepting_conns 1
  STAT listen_disabled_num 0
  STAT threads 4
  STAT conn_yields 0
  STAT hash_power_level 16
  STAT hash_bytes 524288
  STAT hash_is_expanding 0
  STAT bytes 77
  STAT curr_items 1
  STAT total_items 1
  STAT expired_unfetched 0
  STAT evicted_unfetched 0
  STAT evictions 0
  STAT reclaimed 0
  END
  

• 

  Java应用程序使用stats

  要从Memcached服务器获取统计信息，您需要使用Memcached getStats方法。

  
  import java.io.IOException;
  import java.net.InetSocketAddress;
  import net.spy.memcached.MemcachedClient;
  
  public class MemcachedJava {
     public static void main(String[] args) {
  
        // Connecting to Memcached server on localhost
        MemcachedClient mcc = null;
        try {
           mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));
        } catch (IOException e) {
           // TODO 自动生成的 catch 块
           e.printStackTrace();
        }
        System.out.println("Connection to server sucessfully");
  
        System.out.println(mcc.getStats());
     }
  }
  

  在编译和执行程序时，您将看到以下输出-

  
  Connection to server sucessfully 
  {/127.0.0.1:11211={incr_hits=2, get_hits=20, delete_hits=1, evictions=0, pid=9920, cas_badval=0, curr_connections=22, cmd_flush=0, total_items=15, bytes_written=1569, cas_hits=1, accepting_conns=1, auth_errors=0, decr_hits=2, limit_maxbytes=67108864, decr_misses=0, reclaimed=3, cmd_get=21, curr_items=1, threads=4, cmd_set=16, bytes_read=856, conn_yields=0, version=1.4.5_4_gaa7839e, uptime=16345, listen_disabled_num=0, total_connections=25, get_misses=1, incr_misses=0, connection_structures=23, bytes=56, time=1605073576, auth_cmds=0, pointer_size=32, cas_misses=0, delete_misses=0}}