You might have encountered cannot access to your website with error related to memory exhausted and system try to reserve memory with certain memory allocations.
Solutions:- Login to your cPanel and click on File Manager.
- It will open a new window to confirm that you are going to open a File Manager window. Make sure you have selected "show hidden files"
- In the File Manager window, go to public_html folder and select .htaccess file.
- Click edit button on the top of the File Manager and will open a new window which allow you to edit .htaccess file.
- Add below line.
php_value memory_limit 1024M
- You may change the value according to your application need.
- Once done, you need to click on the save button.
- You should be able to solve the issue.
Joomla: may require 2048M to allow it to works.
Others: may work with 500M