mysql时间函数使用 MySQL中开启和使用通用查询日志的实例jrs看球网直播吧_低调看直播体育app软件下载_低调看体育直播(3/7)

Bye
suse11b:~ # service mysql stop
Shutting down MySQL...   done
suse11b:~ # mysqld --general_log_file=/tmp/suse11b.log --user=mysql &
[1] 47009
suse11b:~ # ps -ef|grep mysql|grep -v grep
mysql 47009 44514 1 16:22 pts/0 00:00:00 mysqld --general_log_file=/tmp/suse11b.log --user=mysql
root 47053 44514 0 16:22 pts/0 00:00:00 grep mysql
suse11b:~ # mysql

root@localhost[(none)]> system ls /tmp/suse11b.log

ls: cannot access /tmp/suse11b.log: No such file or directory

root@localhost[(none)]> show variables like '%gener%';

+------------------+------------------+
| Variable_name | Value |
+------------------+------------------+
| general_log | OFF  |
| general_log_file | /tmp/suse11b.log |
+------------------+------------------+

root@localhost[(none)]> set global general_log=on;

Query OK, 0 rows affected (0.01 sec)

--此时从系统变量看出，通用日志已经到/tmp目录下
root@localhost[(none)]> show variables like '%gener%';

+------------------+------------------+
| Variable_name | Value |
+------------------+------------------+
| general_log | ON  |
| general_log_file | /tmp/suse11b.log |
+------------------+------------------+

--发布查询
root@localhost[(none)]> select count(*) from tempdb.tb1;

+----------+
| count(*) |
+----------+
| 1 |
+----------+

--查看通用日志文件内容
root@localhost[(none)]> system more /tmp/suse11b.log

mysqld, Version: 5.5.39-log (MySQL Community Server (GPL)). started with:
Tcp port: 3306 Unix socket: /var/lib/mysql/mysql.sock
Time  Id Command Argument
141003 16:30:03 1 Query show variables like '%gener%'
141003 16:30:09 1 Query select count(*) from tempdb.tb1

c、通用查询日志输出方式

--可以输出为文件，表以及不输出，即TABLE，FILE，NONE
--系统变量log_output
root@localhost[(none)]> show variables like 'log_output';

+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| log_output | FILE |
+---------------+-------+

--下面修改为输出为表方式
root@localhost[(none)]> set global log_output='TABLE';

Query OK, 0 rows affected (0.00 sec)