Memcached - Stats

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Memcached stats command is used to return server statistics such as PID, version, connections, etc.

Syntax

The basic syntax of Memcached stats command is as shown below −

stats

Example

stats
STAT pid 1162
STAT uptime 5022
STAT time 1415208270
STAT version 1.4.14
STAT libevent 2.0.19-stable
STAT pointer_size 64
STAT rusage_user 0.096006
STAT rusage_system 0.152009
STAT curr_connections 5
STAT total_connections 6

STAT connection_structures 6
STAT reserved_fds 20
STAT cmd_get 6
STAT cmd_set 4
STAT cmd_flush 0
STAT cmd_touch 0
STAT get_hits 4
STAT get_misses 2
STAT delete_misses 1
STAT delete_hits 1

STAT incr_misses 2
STAT incr_hits 1
STAT decr_misses 0
STAT decr_hits 1
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 262
STAT bytes_written 313
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 expired_unfetched 1
STAT evicted_unfetched 0
STAT bytes 142
STAT curr_items 2
STAT total_items 6
STAT evictions 0
STAT reclaimed 1
END

Stats Using Java Application

To get stats from a Memcached server, you need to use the Memcached stats method.

Example

import net.spy.memcached.MemcachedClient;
public class MemcachedJava {
   public static void main(String[] args) {
      
      // Connecting to Memcached server on localhost
      MemcachedClient mcc = new MemcachedClient(new
      InetSocketAddress("127.0.0.1", 11211));
      System.out.println("Connection to server successful");
      System.out.println("Stats:"+mcc.stats);
   }
}

Output

On compiling and executing the program, you get to see the following output −

Connection to server successful
Stats:[/127.0.0.1:11211:[delete_hits:0, bytes:71, total_items:4,
rusage_system:0.220013, touch_misses:0, cmd_touch:0, listen_disabled_num:0,
auth_errors:0, evictions:0, version:1.4.14, pointer_size:64, time:1417279366,
incr_hits:1, threads:4, expired_unfetched:0, limit_maxbytes:67108864,
hash_is_expanding:0, bytes_read:170, curr_connections:8, get_misses:1,
reclaimed:0, bytes_written:225, hash_power_level:16, connection_structures:9,
cas_hits:0, delete_misses:0, total_connections:11, rusage_user:0.356022,
cmd_flush:0, libevent:2.0.19-stable, uptime:12015, reserved_fds:20,
touch_hits:0, cas_badval:0, pid:1138, get_hits:2, curr_items:1, cas_misses:0,
accepting_conns:1, evicted_unfetched:0, cmd_get:3, cmd_set:2, auth_cmds:0,
incr_misses:1, hash_bytes:524288, decr_misses:1, decr_hits:1, conn_yields:0]]