Imported From: http://groups.google.com/group/in-portal-dev/browse_thread/thread/22da5ee2d56401c5#
One recent project has shown, that having die() executed frequently in
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code might cause database connection to "freeze", in other words -
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this "dead" connection does not disconnect and as a result, maximum
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allowed db connections becomes a cause for other sites, running on
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same server, to receive "cannot connect to database server - maximum
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allowed connections exceeded".
Solution
I propose handling database closure process within __destruct() method
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inside of kDbConnection class, as this method should be executed even
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if die() is called.