MySQLServer Information

Parameters

ParametersExplanation
GLOBALShows the variables as they are configured for the entire server. Optional.
SESSIONShows the variables that are configured for this session only. Optional.

SHOW VARIABLES example

To get all the server variables run this query either in the SQL window of your preferred interface (PHPMyAdmin or other) or in the MySQL CLI interface

SHOW VARIABLES;

You can specify if you want the session variables or the global variables as follows:

Session variables:

SHOW SESSION VARIABLES;

Global variables:

SHOW GLOBAL VARIABLES;

Like any other SQL command you can add parameters to your query such as the LIKE command:

SHOW [GLOBAL | SESSION] VARIABLES LIKE 'max_join_size';

Or, using wildcards:

SHOW [GLOBAL | SESSION] VARIABLES LIKE '%size%';

You can also filter the results of the SHOW query using a WHERE parameter as follows:

SHOW [GLOBAL | SESSION] VARIABLES WHERE VALUE > 0;

SHOW STATUS example

To get the database server status run this query in either the SQL window of your preferred interface (PHPMyAdmin or other) or on the MySQL CLI interface.

SHOW STATUS;

You can specify whether you wish to receive the SESSION or GLOBAL status of your sever like so: Session status:

SHOW SESSION STATUS;

Global status:

SHOW GLOBAL STATUS;

Like any other SQL command you can add parameters to your query such as the LIKE command:

SHOW [GLOBAL | SESSION] STATUS LIKE 'Key%';

Or the Where command:

SHOW [GLOBAL | SESSION] STATUS WHERE VALUE > 0;

The main difference between GLOBAL and SESSION is that with the GLOBAL modifier the command displays aggregated information about the server and all of it's connections, while the SESSION modifier will only show the values for the current connection.