Category Archives: Performance

When not to put debug info on your production site

Posted on 02/21/2010 by zd

Title says it all. http://outlet.lenovo.com/report/?id=-528847430&s=public SQLSTATE[HY000]: General error: 5 Out of memory (Needed 25165796 bytes) Trace: #0 /chroot/home/lenovoco/lenovo.com/html/lib/Zend/Db/Statement.php(283): Zend_Db_Statement_Pdo->_execute(Array) #1 /chroot/home/lenovoco/lenovo.com/html/lib/Zend/Db/Adapter/Abstract.php(457): Zend_Db_Statement->execute(Array) #2 /chroot/home/lenovoco/lenovo.com/html/lib/Zend/Db/Adapter/Pdo/Abstract.php(230): Zend_Db_Adapter_Abstract->query(‘SELECT COUNT(DI…’, Array) #3 /chroot/home/lenovoco/lenovo.com/html/lib/Varien/Db/Adapter/Pdo/Mysql.php(281): Zend_Db_Adapter_Pdo_Abstract->query(‘SELECT COUNT(DI…’, Array) #4 /chroot/home/lenovoco/lenovo.com/html/lib/Zend/Db/Adapter/Abstract.php(761): Varien_Db_Adapter_Pdo_Mysql->query(Object(Varien_Db_Select), Array) #5 /chroot/home/lenovoco/lenovo.com/html/lib/Varien/Data/Collection/Db.php(162): Zend_Db_Adapter_Abstract->fetchOne(Object(Varien_Db_Select), Array) … Continue reading →

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Amazon’s MySQL and more EC instances

Posted on 10/27/2009 by zd

One of the major offerings from Amazon Web Service (AWS) is Simple DB, similar to Google’s bigtable, which is not a relational database. Some people have managed to migrated their applications to SDB in order to move their application to … Continue reading →

Posted in Cloud Computing, Performance | Leave a comment

Chrome 4.0.222.5 for Mac released

Posted on 10/16/2009 by zd

If you are on the dev channel, your Chrome will be upgraded automatically. There are some new features as well as some bugfixes. New features include enabling “Edit Search Engine” menu item,  and “default browser”. Performance-wise, it seems this version … Continue reading →

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Windows 7 Visualization on Mac OS X

Posted on 07/03/2009 by zd

Image via Wikipedia Since I got my first Macbook Pro one week ago, the overall experience has been pretty positive. One of most impressive feature I like is quick switch from/to sleep mode. In Windows (and Linux) it usually takes … Continue reading →

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Migrating to Phusion Passenger

Posted on 01/29/2009 by zd

I have been using nginx and mongrel for my rails application on my 256 slice. It has been nice, except administration is becoming a big overhead when considering all the stuff I had to deal with fastcgi scripts for my other … Continue reading →

Posted in Hosting, Performance, Ruby on Rails | Tagged , , , | Leave a comment