Sometimes it is really useful to know how large a certain database table has become. With the following SQL statement you get a list of all tables of the currently connected database with their rounded size in MB: SELECT table_name AS “Table”, round(((data_length + index_length) / 1024 / 1024), 2) “Size in MB” FROM information_schema.TABLES […]
To get information about the currently connected user and more MySQLÂ status information, you can call the following command if you are already logged in: mysql> STATUS; This will give you an output like that: ————– mysql Ver 14.14 Distrib 5.1.73, for redhat-linux-gnu (x86_64) using readline 5.1 Connection id: 1044395 Current database: Current user: niceguy@localhost SSL: […]
To check and optimize tables of a MySQL database: $> mysqlcheck -os <db_name> -u<username> -p To achieve the same for all databases of the respective MySQL server you can run the following command: $> mysqlcheck -Aos -u<username> -p Further information about check and optimize tables in MySQL To get a few more facts about how […]
To find out where the MySQL configuration (my.cnf) is stored, you can use the strace command: $> strace mysql “;” 2>&1 | grep my.cnf You will get an output showing all the paths the MySQL deamon searches for the my.cnf upon startup like that: stat(“/etc/my.cnf”, 0x7fffecb75210) = -1 ENOENT (No such file or directory) stat(“/etc/mysql/my.cnf”, {st_mode=S_IFREG|0644, st_size=3505, […]
