Comments on: PHP Performance Series: Maximizing Your MySQL Database

By: Joost Pluijmers

Joost Pluijmers — Fri, 20 Jun 2008 07:56:11 +0000

Hello, Altough a great atricle I don’t aggree with your lazzy solution to connecting to the database. Because in the following statement you always create a connection to the database:

private function _connect() {
if ($this->_connection = mysql_connect()) {
$this->_connected = true;
}
}

In every check you connect to the database. It should be something like:

private function _connect() {
if (is_null($this->_connection)) {
$this->_connection = mysql_connect();
$this->_connected = true;
}
}

*for clarity I skipped the statement to check or mysql is actualy connected.

In this example you see that everytime you try to “_connect” php doesn’t connect to the SQL server if a connection is already set.

By: CyberGhost

CyberGhost — Thu, 19 Jun 2008 23:56:02 +0000

Mike, thanks for the quick follow-up about MyISAM vs. InnoDB. Also, I didn’t know that the IN() syntax is so fast on primary keys. Suppose we learn new things every day

By: Mike Willbanks

Mike Willbanks — Thu, 19 Jun 2008 14:46:16 +0000

Stuart -
I had initially wrong in my notepad on what I was writing on to address a few of those concepts… That’s what I get for attempting to finish writing this thing so late. I figured if I didn’t post it last night I wouldn’t be posting it for another month… This article was half written for the last 2 months.