How to enable MariaDB/MySQL logs ?
As a web developer that have been toying with MySQL/MariaDB for more than 5 years. I can tell you that the best way to start debugging your application or looking for ways to improve database performance is to enable the logs. To enable the MySQL/MariaDB logs :
Edit MySQL configuration file:
vi /etc/mysql/my.cnf
Note : Depending on your installation, the my.cnf file could be located on different directory. MariaDB's my.cnf is located at /etc/my.cnf
Slow Query Log
To enable Slow Query Log, add these lines or uncomment these two lines. Change the destination location for the log files if you prefer.
logslowqueries = /var/log/mysql/mysql-slow.log
longquerytime = 2
log-queries-not-using-indexes
To enable Error Log, add these lines or uncomment these two lines. Change the destination location for the log files if you prefer.
[mysqld_safe]
logerror=/var/log/mysql/mysqlerror.log
[mysqld]
logerror=/var/log/mysql/mysqlerror.log
To enable General Query Log, add these lines or uncomment these two lines. Change the destination location for the log files if you prefer.
generallogfile = /var/log/mysql/mysql.log general_log = 1
To enable these changes, restart mysql
sudo /etc/init.d/mysql restart
or
sudo service mysql restart
References :
http://dev.mysql.com/doc/refman/5.7/en/slow-query-log.html
By Adam Ng
IF you gain some knowledge or the information here solved your programming problem. Please consider donating to the less fortunate or some charities that you like. Apart from donation, planting trees, volunteering or reducing your carbon footprint will be great too.
Advertisement
Tutorials
+7.2k Golang : Routes multiplexer routing example with regular expression control
+7.5k Golang : Progress bar with ∎ character
+18.8k nginx: [emerg] unknown directive "passenger_enabled"
+3.6k Adding Skype actions such as call and chat into web page examples
+8.4k Facebook : Getting the friends list with PHP return JSON format
+10k Golang : Fix fmt.Scanf() on Windows will scan input twice problem
+5.6k Golang : Derive cryptographic key from passwords with Argon2
+5.7k Get Facebook friends working in same company
+5.1k Golang : Debug with Godebug
+3.9k Javascript : How to get width and height of a div?
+9.1k Golang : Convert file content to Hex
+5.2k Golang : Build new URL for named or registered route with Gorilla webtoolkit example