Error : Maximum execution time of 30 seconds exceeded in Magento.
Solution: You need to increase your maximum execution time for php scripts on your server. You can edit your php.ini file to increase this value
max_execution_time = 600
You can try adding the following line at the start of your file on which you are facing error.
For example : /home/username/public_html/estore/app/code/core/Zend/Cache/Backend/File.php
ini_set('max_execution_time', 300); //300 seconds = 5 minutes