var mysql = require(‘mysql’); var pool = mysql.createPool(…);

pool.getConnection(function(err, connection) { // Use the connection connection.query( 'SELECT something FROM sometable’, function(err, rows) { // And done with the connection. connection.release();

// Don't use the connection here, it has been returned to the pool.

}); });

release只是单纯的将当前connection释放当pool中，否则如果请求的客户端多了，那数据库压力是不是很大？希望懂的人指点一下。