Delay in server response, apache2 codeigniter

Question

Noticing a long delay in server processing time. The application environment is: Apache2
Ubuntu 10.04 PHP 5.3 Codeigniter 2.1
first call after a time causes a significant delay
codeigniter profiler is enabled and gives this feedback
Loading Time: Base Classes 2.7587
Controller Execution Time ( Home / Index ) 7.2188
Total Execution Time 9.9777
There are only 2 database active record queries both taking less than a 10th of a second.
I am not using any kind of cache.
However the same page on refreshing yields this by the codeigniter profiler
Loading Time: Base Classes 0.0074
Controller Execution Time ( Home / Index ) 0.1471
Total Execution Time 0.1545

From +9 seconds to almost tenth of a second.
This time there are 2 more database queries (codeigniter session fetch and updtate)
Is there something i can modify to to reduce the time when a new session is started?

Answer 1

what kind of database driver do you use? are they differs with the other page? cause i have faced this problem too. i use mysql database server version 5.XX i use CI 2.0.3

this is the report from the profiler

using driver mysql

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Loading Time: Base Classes 0.4485 Controller Execution Time ( Single Import / Get Dpt Count By Region ) 0.1042 Total Execution Time 0.5531

using driver mysqli

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Loading Time: Base Classes 1.4436 Controller Execution Time ( Single Import / Get Dpt Count By Region ) 1.1049 Total Execution Time 2.5488

so i suggest you to only use mysql driver, i still don't any clue(don't have time to debug:D) if there is a problem with CI when try to load mysqli driver cause the load base classes significant than the other one(mysql). i hope this can help you. :)

Answer 2

CodeIgniter in opposite to Zend is already lighted. Try comment unused libraries.

Answer 3

There is no doubt it's something wrong with your server installation.

I use Ubuntu 11.04 with the last XAMPP and it works great, try reinstalling your server.