Linux中使用mysqladmin extended-status配合Linux命令查看MySQL运行状态
mysqladmin是MySQL一个重要的客户端,最常见的是使用它来关闭数据库,除此,该命令还可以了解MySQL运行状态、进程信息、进程杀死等。本文介绍一下如何使用mysqladminextended-status(因为没有"歧义",所以可以使用ext代替)了解MySQL的运行状态。
1.使用-r/-i参数
使用mysqladminextended-status命令可以获得所有MySQL性能指标,即showglobalstatus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mysqladminextended-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-i1-pxxxextended-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-i1-pxxxextended-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-i1ext|\ 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-i1ext|\ awk-F"|"\ "BEGIN{count=0;}"\ '{if($2~/Variable_name/&&++count==1){\ print"----------|---------|---MySQLCommandStatus--|-----Innodbrowoperation----|--BufferPoolRead--";\ print"---Time---|---QPS---|selectinsertupdatedelete| readinsertedupdateddeleted| logical physical";\ }\ elseif($2~/Queries/){queries=$3;}\ elseif($2~/Com_select/){com_select=$3;}\ elseif($2~/Com_insert/){com_insert=$3;}\ elseif($2~/Com_update/){com_update=$3;}\ elseif($2~/Com_delete/){com_delete=$3;}\ elseif($2~/Innodb_rows_read/){innodb_rows_read=$3;}\ elseif($2~/Innodb_rows_deleted/){innodb_rows_deleted=$3;}\ elseif($2~/Innodb_rows_inserted/){innodb_rows_inserted=$3;}\ elseif($2~/Innodb_rows_updated/){innodb_rows_updated=$3;}\ elseif($2~/Innodb_buffer_pool_read_requests/){innodb_lor=$3;}\ elseif($2~/Innodb_buffer_pool_reads/){innodb_phr=$3;}\ elseif($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\n",innodb_lor,innodb_phr);\ }}'
----------|---------|---MySQLCommandStatus--|-----Innodbrowoperation----|--BufferPoolRead-- ---Time---|---QPS---|selectinsertupdatedelete| readinsertedupdateddeleted| 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。