Mysql必读mysql DBA：mysqladmin常用命令总结

发布时间：2020-12-12 02:32:21 所属栏目：MySql教程来源：网络整理

导读：《Mysql必读mysql DBA：mysqladmin常用命令总结》要点：本文介绍了Mysql必读mysql DBA：mysqladmin常用命令总结，希望对您有用。如果有疑问，可以联系我们。 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

《Mysql必读mysql DBA：mysqladmin常用命令总结》要点：
本文介绍了Mysql必读mysql DBA：mysqladmin常用命令总结，希望对您有用。如果有疑问，可以联系我们。

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：
MYSQL必读

代码如下: 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：
代码如下: 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：
代码如下: 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：
代码如下: mysqladmin -P3306 -uroot -p -h127.0.0.1 -r -i 1 ext |
awk -F"|"
"BEGIN{ count=0; }"
'{ if($2 ~ /Variable_name/ && ++count == 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 %11dn",innodb_lor,innodb_phr);
}}'
代码如下: ----------|---------|--- 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???????

就这样了,这几个命令本身用的比较多,随手分享出来.MYSQL必读

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