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  • 使用mysqladmin ext 了解MySQL运行状态 转

    https://yq.aliyun.com/articles/11210?spm=0.0.0.0.HpobXF

    1. 使用-r/-i参数

    使用mysqladmin extended-status命令可以获得所有MySQL性能指标,即show global status的输出,不过,因为多数这些指标都是累计值,如果想了解当前的状态,则需要进行一次差值计算,这就是mysqladmin extended-status的一个额外功能,非常实用。默认的,使用extended-status,看到也是累计值,但是,加上参数-r(--relative),就可以看到各个指标的差值,配合参数-i(--sleep)就可以指定刷新的频率,那么就有如下命令:

    mysqladmin -uroot -r -i 1 -pxxx extended-status
    +------------------------------------------+----------------------+
    | Variable_name                            | Value                |
    +------------------------------------------+----------------------+
    | Aborted_clients                          | 0                    |
    | Com_select                               | 336                  |
    | Com_insert                               | 243                  |
    ......
    | Threads_created                          | 0                    |
    +------------------------------------------+----------------------+

     

    2. 配合grep使用

    配合grep使用,我们就有:

    mysqladmin -uroot -r -i 1 -pxxx extended-status 
    |grep "Questions|Queries|Innodb_rows|Com_select |Com_insert |Com_update |Com_delete "
    | Com_delete                               | 1                    |
    | Com_delete_multi                         | 0                    |
    | Com_insert                               | 321                  |
    | Com_select                               | 286                  |
    | Com_update                               | 63                   |
    | Innodb_rows_deleted                      | 1                    |
    | Innodb_rows_inserted                     | 207                  |
    | Innodb_rows_read                         | 5211                 |
    | Innodb_rows_updated                      | 65                   |
    | Queries                                  | 2721                 |
    | Questions                                | 2721                 |

     

    3. 配合简单的awk使用

    使用awk,同时输出时间信息:

    mysqladmin -uroot -p -h127.0.0.1 -P3306 -r -i 1 ext |
    awk -F"|" '{
      if($2 ~ /Variable_name/){
        print " <-------------    "  strftime("%H:%M:%S") "    ------------->";
      }
      if($2 ~ /Questions|Queries|Innodb_rows|Com_select |Com_insert |Com_update |Com_delete |Innodb_buffer_pool_read_requests/)
        print $2 $3;
    }'
    <-------------    12:38:49    ------------->
     Com_delete                             0
     Com_insert                             0
     Com_select                             0
     Com_update                             0
     Innodb_buffer_pool_read_requests       589
     Innodb_rows_deleted                    0
     Innodb_rows_inserted                   2
     Innodb_rows_read                       50
     Innodb_rows_updated                    50
     Queries                                105
     Questions                              1
     <-------------    12:38:50    ------------->
     Com_delete                             0
     Com_insert                             0
     Com_select                             0
     Com_update                             0
     Innodb_buffer_pool_read_requests       1814
     Innodb_rows_deleted                    0
     Innodb_rows_inserted                   0
     Innodb_rows_read                       8
     Innodb_rows_updated                    8
     Queries                                17
     Questions                              1

     

    4. 配合复杂一点的awk

    反正也不简单了,那就更复杂一点,这样让输出结果更友好点,因为awk不支持动态变量,所以代码看起来比较复杂:

    mysqladmin -P3306 -uroot -p -h127.0.0.1 -r -i 1 ext |
    awk -F"|" 
    "BEGIN{ count=0; }"
    '{ if($2 ~ /Variable_name/ && ((++count)%20 == 1)){
        print "----------|---------|--- MySQL Command Status --|----- Innodb row operation ----|-- Buffer Pool Read --";
        print "---Time---|---QPS---|select insert update delete|  read inserted updated deleted|   logical    physical";
    }
    else if ($2 ~ /Queries/){queries=$3;}
    else if ($2 ~ /Com_select /){com_select=$3;}
    else if ($2 ~ /Com_insert /){com_insert=$3;}
    else if ($2 ~ /Com_update /){com_update=$3;}
    else if ($2 ~ /Com_delete /){com_delete=$3;}
    else if ($2 ~ /Innodb_rows_read/){innodb_rows_read=$3;}
    else if ($2 ~ /Innodb_rows_deleted/){innodb_rows_deleted=$3;}
    else if ($2 ~ /Innodb_rows_inserted/){innodb_rows_inserted=$3;}
    else if ($2 ~ /Innodb_rows_updated/){innodb_rows_updated=$3;}
    else if ($2 ~ /Innodb_buffer_pool_read_requests/){innodb_lor=$3;}
    else if ($2 ~ /Innodb_buffer_pool_reads/){innodb_phr=$3;}
    else if ($2 ~ /Uptime / && count >= 2){
      printf(" %s |%9d",strftime("%H:%M:%S"),queries);
      printf("|%6d %6d %6d %6d",com_select,com_insert,com_update,com_delete);
      printf("|%6d %8d %7d %7d",innodb_rows_read,innodb_rows_inserted,innodb_rows_updated,innodb_rows_deleted);
      printf("|%10d %11d
    ",innodb_lor,innodb_phr);
    }}'
    ----------|---------|--- MySQL Command Status --|----- Innodb row operation ----|-- Buffer Pool Read --
    ---Time---|---QPS---|select insert update delete|  read inserted updated deleted|   logical    physical
     10:37:13 |     2231|   274    214     70      0|  4811      160      71       0|      4146           0
     10:37:14 |     2972|   403    256     84     23|  2509      173      85      23|      4545           0
     10:37:15 |     2334|   282    232     66      1|  1266      154      67       1|      3543           0
     10:37:15 |     2241|   271    217     66      0|  1160      129      66       0|      2935           0
     10:37:17 |     2497|   299    224     97      0|  1141      149      95       0|      3831           0
     10:37:18 |     2871|   352    304     74     23|  8202      226      73      23|      6167           0
     10:37:19 |     2441|   284    233     82      0|  1099      121      78       0|      3292           0
     10:37:20 |     2342|   279    242     61      0|  1083      224      61       0|      3366           0

     

    就这样了,这几个命令自己用的比较多,随手分享出来。

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  • 原文地址:https://www.cnblogs.com/zengkefu/p/5452877.html
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