Check MySQL Connections


Handy commands for checking MySQL connections via command line.

View Connection number

show status like 'Conn%';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| Connections   | 500   |
+---------------+-------+

View connections by status

show status like '%onn%';
+--------------------------+-------+
| Variable_name            | Value |
+--------------------------+-------+
| Aborted_connects         | 4422  |
| Connections              | 17325 |
| Max_used_connections     | 443   |
| Ssl_client_connects      | 0     |
| Ssl_connect_renegotiates | 0     |
| Ssl_finished_connects    | 0     |
| Threads_connected        | 441   |
+--------------------------+-------+

Process list

show processlist;
+----+------+-----------------+--------+---------+------+-------+------------------+
| Id | User | Host            | db     | Command | Time | State | Info             |
+----+------+-----------------+--------+---------+------+-------+------------------+
|  3 | root | localhost       | webapp | Query   |    0 | NULL  | show processlist | 
|  5 | root | localhost:61704 | webapp | Sleep   |  208 |       | NULL             | 
|  6 | root | localhost:61705 | webapp | Sleep   |  208 |       | NULL             | 
|  7 | root | localhost:61706 | webapp | Sleep   |  208 |       | NULL             | 
+----+------+-----------------+--------+---------+------+-------+------------------+
4 rows in set (0.00 sec)
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