Question

I have a code which Creates a Database Connection as Follows.

$dbConn = new mysqli($dbHost, $dbUserName, $dbUserPasswrd, $database);  

$strSQL = 'SELECT * 
             FROM Table_Name';

$stmt   = $dbConn->prepare($strSQL);
$stmt->execute();

$stmt->close();
$dbConn->close();

I have created a php page where i call this code.

Now when I see the connections in mysql database using toad GUI it is showing 1 connection during the first time the page loads and count keeps on increasing when the page get refreshed.

1.Why the no of connections increase despite I have mysqli close at the end of code

2.Does using $dbConn->close() help in optimizing performace of DB by reducing no of unused connections

Please explain in brief so everyone can learn some.

Thanks for Reply

Answer 1

https://dev.mysql.com/doc/refman/5.5/en/server-status-variables.html says:

Connections: The number of connection attempts (successful or not) to the MySQL server.
Threads_connected: The number of currently open connections.

I.e. connections counts all attempts to connect that have been made while threads_connected is probably the value you are interested in.