使用memcache缓存，运维时查看节点状态步骤记录：
1、链接登陆memcache：
telnet 127.0.0.1 11211 2、输入stats查看节点状态： stats 得出结果：stats STAT pid 944 STAT uptime 1875871 STAT time 1479439473 STAT version 1.4.25 STAT libevent 2.0.22-stable STAT pointer_size 64 STAT rusage_user 25.143349 STAT rusage_system 26.361738 STAT curr_connections 5 STAT total_connections 2996 STAT connection_structures 18 STAT reserved_fds 20 STAT cmd_get 8858 STAT cmd_set 343 STAT cmd_flush 0 STAT cmd_touch 0 STAT get_hits 8527 STAT get_misses 331 STAT delete_misses 13 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 732026 STAT bytes_written 8716566 STAT limit_maxbytes 240123904 STAT accepting_conns 1 STAT listen_disabled_num 0 STAT time_in_listen_disabled_us 0 STAT threads 4 STAT conn_yields 0 STAT hash_power_level 16 STAT hash_bytes 524288 STAT hash_is_expanding 0 STAT malloc_fails 0 STAT bytes 40794 STAT curr_items 19 STAT total_items 343 STAT expired_unfetched 56 STAT evicted_unfetched 0 STAT evictions 0 STAT reclaimed 94 STAT crawler_reclaimed 0 STAT crawler_items_checked 0 STAT lrutail_reflocked 0 END
