How to view operation logs in MYSQL

1. File record database operation log

Enter the mysql query interface and enter the command:

SHOW VARIABLES LIKE 'gen%';

You can see whether the status of the general_log is on or off, and where the general_log file of the account to which it belongs is stored. Table of contents.

If general_log is not turned on, turn it on first and execute the command:

SET GLOBAL general_log=ON;

Then you can go to the corresponding general_log directory to view the execution log.

2. Database table recording operation log

First execute the command:

SHOW VARIABLES LIKE 'log_output';

The default is FILE mode. Execute the command and modify it to TABLE method:

SET GLOBAL log_output='TABLE';

Then you can query the operation log through the command:

SELECT * FROM mysql.general_log;

Using a database table to record operation logs will increase the pressure on the data, so it is recommended to use files Record the operation log:

SET GLOBAL log_output='FILE';
TRUNCATE TABLE mysql.log_output;

Attachment: View the operation log of mysql by time period

1. Log in to the machine where mysql is installed and find my.cnf. My my.cnf file is in etc Underground, execute cat /etc/my.cnf and see the binlogs storage location as shown in the figure

2. Enter the directory where the log is located cd /home/mysql/logs /binlogs, enter ls -al to view the time when the binlogs you want to view are generated.

3. If you need to query the operation log of geeRunner from 2017-09-17 07:21:09 to 2017-09-19 07:59:50, enter the following Just command to write the data to a spare txt.

mysqlbinlog --no-defaults --database=geeRunner --start-datetime="2017-09-17 07:21:09" --stop-datetime="2017-09-19 07:59:50" binlogs.000080 > sanjiaomao.txt

4. If you want to query locally, enter the command

 mysqlbinlog --no-defaults --database=geeRunner --start-datetime="2017-09-17 07:21:09" --stop-datetime="2017-09-19 07:59:50" binlogs.000080 | more

5. If you want to query it locally, use the winscp tool to log in to the machine where the db is located and copy the data take out.

6. If you need to filter and only query insert, update, delete statements, you can write like this:

mysqlbinlog --no-defaults --database=raceEnroll  binlogs.000078 |grep update |more

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