Mysqladmin is an important client of MySQL, the most common is to use it to close the database, in addition to this command can also understand the running state of MySQL, process information, process killing and so on. This article describes how to use the Mysqladmin extended-status (because there is no "ambiguity", so you can use Ext instead) to understand the running state of MySQL.
1. Use-r/-i parameter
Using the mysqladmin extended-status command, you get all the MySQL performance metrics, the output of show global status, but because most of these metrics are cumulative, you need to perform a margin calculation if you want to know the current state. This is an additional feature of Mysqladmin extended-status, very practical. The default, using Extended-status, see also cumulative value, but, plus the parameter-R (--relative), you can see the difference between the indicators, with the parameter-I (--sleep) can specify the frequency of the refresh, then like the following command:
Copy Code code as follows:
Mysqladmin-uroot-r-I. 1-pxxx extended-status
+------------------------------------------+----------------------+
| variable_name | Value |
+------------------------------------------+----------------------+
| aborted_clients | 0 |
| Com_select | 336 |
| Com_insert | 243 |
......
| threads_created | 0 |
+------------------------------------------+----------------------+
2. Use with grep
Together with grep, we have:
Copy Code code as follows:
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. In conjunction with simple awk
Use awk to output time information simultaneously:
Copy Code code as follows:
Mysqladmin-uroot-p-h127.0.0.1-p3306-r-I 1 ext |\
Awk-f "|" '{\
if ($ ~/variable_name/) {\
Print "<-------------" Strftime ("%h:%m:%s") "------------->"; \
}\
if ($ ~/questions| queries| innodb_rows| Com_select | Com_insert | Com_update | Com_delete | innodb_buffer_pool_read_requests/) \
Print $ $3;\
}'
<-------------12:38:49------------->
Com_delete 0
Com_insert 0
Com_select 0
Com_update 0
Innodb_buffer_pool_read_requests 589
innodb_rows_deleted 0
Innodb_rows_inserted 2
Innodb_rows_read 50
innodb_rows_updated 50
Queries 105
Questions 1
<-------------12:38:50------------->
Com_delete 0
Com_insert 0
Com_select 0
Com_update 0
Innodb_buffer_pool_read_requests 1814
innodb_rows_deleted 0
innodb_rows_inserted 0
Innodb_rows_read 8
Innodb_rows_updated 8
Queries 17
Questions 1
4. With a complex awk
It's not easy anyway, it's a little bit more complicated, so the output is a bit more friendly because awk doesn't support dynamic variables, so the code looks more complicated:
Copy Code code as follows:
Mysqladmin-p3306-uroot-p-h127.0.0.1-r-I 1 ext |\
Awk-f "|" \
"Begin{count=0;}" \
' {if ($ ~/variable_name/&& ++count = 1) {\
Print "----------|---------|---MySQL Command Status--|-----Innodb row operation----| |
Print---time---|---QPS---|select insert update delete| Read inserted updated deleted| Logical physical ";
}\
else if ($ ~/queries/) {queries=$3} \
else if ($ ~/com_select/) {com_select=$3} \
else if ($ ~/com_insert/) {com_insert=$3} \
else if ($ ~/com_update/) {com_update=$3} \
else if ($ ~/com_delete/) {com_delete=$3} \
else if ($ ~/innodb_rows_read/) {innodb_rows_read=$3} \
else if ($ ~/innodb_rows_deleted/) {innodb_rows_deleted=$3} \
else if ($ ~/innodb_rows_inserted/) {innodb_rows_inserted=$3} \
else if ($ ~/innodb_rows_updated/) {innodb_rows_updated=$3} \
else if ($ ~/innodb_buffer_pool_read_requests/) {innodb_lor=$3} \
else if ($ ~/innodb_buffer_pool_reads/) {innodb_phr=$3} \
else if ($ ~/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); \
}}'
Copy Code code as follows:
----------|---------|---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
In this way, these commands themselves to use more, readily shared out.
