MySQL show status - active or total connections?

Question

When I run show status like 'Con%' it shows the number of connections, which is 9972 and constantly growing. Is this an active number of connections or connections made in total?

Answer 1

According to the docs, it means the total number throughout history:

Connections

The number of connection attempts (successful or not) to the MySQL server.

You can see the number of active connections either through the Threads_connected status variable:

Threads_connected

The number of currently open connections.

mysql> show status where `variable_name` = 'Threads_connected';
+-------------------+-------+
| Variable_name     | Value |
+-------------------+-------+
| Threads_connected | 4     |
+-------------------+-------+
1 row in set (0.00 sec)

... or through the show processlist command:

mysql> 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)

Answer 2

SHOW STATUS WHERE `variable_name` = 'Threads_connected';

This will show you all the open connections.

Answer 3

You can also do

SHOW STATUS WHERE `variable_name` = 'Max_used_connections';

Answer 4

This is the total number of connections to the server till now. To find current conection status you can use

mysqladmin -u -p extended-status | grep -wi 'threads_connected\|threads_running' | awk '{ print $2,$4}'

This will show you:

Threads_connected 12

Threads_running 1  

Threads_connected: Number of connections

Threads_running: connections currently running some sql

Answer 5

To see a more complete list you can run:

show session status;

or

show global status;

See this link to better understand the usage.

If you want to know details about the database you can run:

status;

Answer 6

In order to check the maximum allowed connections, you can run the following query:

SHOW VARIABLES LIKE "max_connections";

To check the number of active connections, you can run the following query:

SHOW VARIABLES LIKE "max_used_connections";

Hope it helps.

Answer 7

As per doc http://dev.mysql.com/doc/refman/5.0/en/server-status-variables.html#statvar_Connections

Connections

The number of connection attempts (successful or not) to the MySQL server.

Answer 8

A GUI solutions of MySQL queries:

If someone wants to show all active connection without any MySQL code, then you can use Session Manager in dbForge Studio:

Simply, open Database > Session Manager in the upper menu, and you'll see all active connections:

It will do the same thing that is done by these MySQL commands:

show full processlist;
SELECT * FROM information_schema.PROCESSLIST p;
SELECT * FROM performance_schema.threads t;

Answer 9

It should be the current number of active connections. Run the command processlist to make sure.

URL for reference: http://www.devdaily.com/blog/post/mysql/how-show-open-database-connections-mysql

EDIT: Number of DB connections opened Please take a look here, the actual number of threads (connections) are described here!