命令行查看Memcached运行状态(shell或者telnet) 测试 Memcach

查看memcached状态的基本命令,通过这个命令可以看到如下信息:

STAT pid 22459                             进程ID
STAT uptime 1027046                        服务器运行秒数
STAT time 1273043062                       服务器当前unix时间戳
STAT version 1.4.4                         服务器版本
STAT pointer_size 64                       操作系统字大小(这台服务器是64位的)
STAT rusage_user 0.040000                  进程累计用户时间
STAT rusage_system 0.260000                进程累计系统时间
STAT curr_connections 10                   当前打开连接数
STAT total_connections 82                  曾打开的连接总数
STAT connection_structures 13              服务器分配的连接结构数
STAT cmd_get 54                            执行get命令总数
STAT cmd_set 34                            执行set命令总数
STAT cmd_flush 3                           指向flush_all命令总数
STAT get_hits 9                            get命中次数
STAT get_misses 45                         get未命中次数
STAT delete_misses 5                       delete未命中次数
STAT delete_hits 1                         delete命中次数
STAT incr_misses 0                         incr未命中次数
STAT incr_hits 0                           incr命中次数
STAT decr_misses 0                         decr未命中次数
STAT decr_hits 0                           decr命中次数
STAT cas_misses 0   cas未命中次数
STAT cas_hits 0                            cas命中次数
STAT cas_badval 0                          使用擦拭次数
STAT auth_cmds 0
STAT auth_errors 0
STAT bytes_read 15785                      读取字节总数
STAT bytes_written 15222                   写入字节总数
STAT limit_maxbytes 1048576                分配的内存数(字节)
STAT accepting_conns 1                     目前接受的链接数
STAT listen_disabled_num 0                 
STAT threads 4                             线程数
STAT conn_yields 0
STAT bytes 0                               存储item字节数
STAT curr_items 0                          item个数
STAT total_items 34                        item总数
STAT evictions 0                           为获取空间删除item的总数

 

stats items

输出各个slab中的item信息。s

stats slabs

输出slab中更详细的item信息

stats sizes

输出所有item的大小和个数

 

stats cachedump <slab_id> <limit_num>

 
根据<slab_id>输出相同的<slab_id>中的item信息。<limit_num>是输出的个数,当<limit_num>为0是输出所有的item。

利用shell命令操作Memcached

1、数据存储(假设key为g,value为12345)

   

 printf "set g 0 0 5\r\n12345\r\n"|nc 127.0.0.1 11211

    STORED

    2、数据取回(假设key为zhangyan)

 

printf "get g\r\n"|nc 127.0.0.1 11211

    VALUE g 0 5
     12345
     END

    3、数值增加1(假设key为g,并且value为正整数)

   

 printf "incr g 1\r\n" | nc 127.0.0.1 11211

    12346

    4、数值减少3(假设key为g,并且value为正整数)

 

 printf "decr g  3\r\n" | nc 127.0.0.1 11211

    12343

    5、数据删除(假设key为g)

   

 printf "delete g\r\n" | nc 127.0.0.1 11211

    DELETED

    6、查看Memcached状态

 

 printf "stats\r\n" | nc 127.0.0.1 11211

  STAT pid 3025
 STAT uptime 4120500
 STAT time 1228021767
 STAT version 1.2.6
 STAT pointer_size 32
 STAT rusage_user 433.463103
 STAT rusage_system 1224.515845
 STAT curr_items 1132460
 STAT total_items 8980260
 STAT bytes 1895325386
 STAT curr_connections 252
 STAT total_connections 547850
 STAT connection_structures 1189
 STAT cmd_get 13619685
 STAT cmd_set 8980260
 STAT get_hits 6851607
 STAT get_misses 6768078
 STAT evictions 0
 STAT bytes_read 160396238246
 STAT bytes_written 260080686529
 STAT limit_maxbytes 2147483648
 STAT threads 1
 END

  7、模拟top命令,查看Memcached状态:

 

 watch "printf 'stats\r\n' | nc 127.0.0.1 11211"
  
  或者
  
   watch "echo stats | nc 127.0.0.1 11211"

一、echo stats items | nc127.0.0.1 11211
STAT items:1:number 998                   Slab Id=1 ; items数量:998(也就是已经存储了998个key值)
STAT items:1:age 604348                   Slab Id=1 ; 已经存在时间,单位秒
STAT items:1:evicted 0                        Slab Id=1 ; 被踢出的数量
STAT items:1:evicted_nonzero 0
STAT items:1:evicted_time 0
STAT items:1:outofmemory 0
STAT items:1:tailrepairs 0
STAT items:1:reclaimed 0
STAT items:6:number 91897              Slab Id=6 ; items数量:91897(也就是已经存储了91897个key值)
STAT items:6:age 604345                  Slab Id=6 ; 已经存在时间,单位秒
STAT items:6:evicted 0                       Slab Id=6 ; 被踢出的数量
STAT items:6:evicted_nonzero 0
STAT items:6:evicted_time 0
STAT items:6:outofmemory 0
STAT items:6:tailrepairs 0
STAT items:6:reclaimed 0

( ! ) Warning: count(): Parameter must be an array or an object that implements Countable in /var/www/vhosts/shan.info/httpdocs/templates/gk_publisher/html/com_k2/templates/default/item.php on line 169
Call Stack
#TimeMemoryFunctionLocation
10.0012412376{main}( ).../index.php:0
20.16934270528Joomla\CMS\Application\SiteApplication->execute( ).../index.php:49
30.16934270528Joomla\CMS\Application\SiteApplication->doExecute( ).../CMSApplication.php:196
40.515411392560Joomla\CMS\Application\SiteApplication->dispatch( ).../SiteApplication.php:233
50.516511416584Joomla\CMS\Component\ComponentHelper::renderComponent( ).../SiteApplication.php:194
60.517711471912Joomla\CMS\Component\ComponentHelper::executeComponent( ).../ComponentHelper.php:377
70.518411498880require_once( '/var/www/vhosts/shan.info/httpdocs/components/com_k2/k2.php' ).../ComponentHelper.php:402
80.529211895368K2ControllerItem->execute( ).../k2.php:64
90.529211895368K2ControllerItem->display( ).../BaseController.php:710
100.543112539776K2ControllerItem->display( ).../item.php:78
110.543112539776K2ControllerItem->display( ).../controller.php:19
120.548412906832Joomla\CMS\Cache\Controller\ViewController->get( ).../BaseController.php:663
130.551712927200K2ViewItem->display( ).../ViewController.php:102
140.704215788576K2ViewItem->display( ).../view.html.php:742
150.704215788576K2ViewItem->loadTemplate( ).../HtmlView.php:230
160.707915960880include( '/var/www/vhosts/shan.info/httpdocs/templates/gk_publisher/html/com_k2/templates/default/item.php' ).../HtmlView.php:701

( ! ) Notice: Only variables should be assigned by reference in /var/www/vhosts/shan.info/httpdocs/templates/gk_publisher/html/com_k2/templates/default/item.php on line 478
Call Stack
#TimeMemoryFunctionLocation
10.0012412376{main}( ).../index.php:0
20.16934270528Joomla\CMS\Application\SiteApplication->execute( ).../index.php:49
30.16934270528Joomla\CMS\Application\SiteApplication->doExecute( ).../CMSApplication.php:196
40.515411392560Joomla\CMS\Application\SiteApplication->dispatch( ).../SiteApplication.php:233
50.516511416584Joomla\CMS\Component\ComponentHelper::renderComponent( ).../SiteApplication.php:194
60.517711471912Joomla\CMS\Component\ComponentHelper::executeComponent( ).../ComponentHelper.php:377
70.518411498880require_once( '/var/www/vhosts/shan.info/httpdocs/components/com_k2/k2.php' ).../ComponentHelper.php:402
80.529211895368K2ControllerItem->execute( ).../k2.php:64
90.529211895368K2ControllerItem->display( ).../BaseController.php:710
100.543112539776K2ControllerItem->display( ).../item.php:78
110.543112539776K2ControllerItem->display( ).../controller.php:19
120.548412906832Joomla\CMS\Cache\Controller\ViewController->get( ).../BaseController.php:663
130.551712927200K2ViewItem->display( ).../ViewController.php:102
140.704215788576K2ViewItem->display( ).../view.html.php:742
150.704215788576K2ViewItem->loadTemplate( ).../HtmlView.php:230
160.707915960880include( '/var/www/vhosts/shan.info/httpdocs/templates/gk_publisher/html/com_k2/templates/default/item.php' ).../HtmlView.php:701
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