Programmer's Notes » session http://programmersnotes.info Notes on the web-development and artificial intelligence. Mon, 18 Jul 2011 13:20:46 +0000 en hourly 1 http://wordpress.org/?v=3.1 Speeding up Yii or why should you use DB sessions http://programmersnotes.info/2009/03/05/speeding-up-yii-or-why-should-you-use-db-sessions/ http://programmersnotes.info/2009/03/05/speeding-up-yii-or-why-should-you-use-db-sessions/#comments Thu, 05 Mar 2009 04:02:35 +0000 Konstantin Mirin http://programmersnotes.info/?p=135 Yet Another Related Posts Plugin.]]> Yesterday I’ve read a post on The Developer’s Day blog. Then tested this thing in Yii. There is a jQuery in my application, so I created test controller and test action, that only outputted “Hello, world” and called it from the firebug console like this (I have url rewrite set up):

  1. $.ajax({url:‘/test/test.html’});
  2. $.ajax({url:‘/test/test.html’});
  3. $.ajax({url:‘/test/test.html’});
  4. $.ajax({url:‘/test/test.html’});
  5. $.ajax({url:‘/test/test.html’});
  6. $.ajax({url:‘/test/test.html’});
  7.  

Yes, really it matters. Each call starts after the previous one ends and it takes long to finish them all. But each web application handles the concurrent requests by nature. So I started a forum thread to clarify this. And sebas recommended me to use CDbHttpSession instead of standard one. Yes, I knew, that storing sessions in DB speeds up the application, but I thought that is because of more effective search. And it turns out, that besides more effective search it gives one more DB benefit – concurrent access to the session storage. That’s actually the reason #1 why we usually use databases instead of files :)
So here is a quick trick, that solves the problem:

  1.  
  2. // application components
  3.         ‘components’=>array(
  4. ……….
  5.                 ‘session’ => array(
  6.                         ‘class’ => ‘system.web.CDbHttpSession’,
  7.                         ‘connectionID’ => ‘db’,
  8.                 ),
  9.         ),
  10.  

It creates a new table YiiSession and uses it for session data. This time the JS test above runs much faster. Try it yourself!

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