It is very common to exceed this limit and get the error Fatal error: Allowed memory size. The fatal error message looks similar to this one:

Fatal error: Allowed memory size of 23556632 bytes exhausted (tried to allocate 3349917 bytes) in /home/xxxxx/public_html/wp-includes/plugin.php on line xxx

How to increase the WordPress allowed memory size for your wordpress website?

To adjust on your own, here are some methods to try. Be aware that this section requires advanced knowledge; it is not basic.

Edit your wp-config.php file

Add this to the top, before the line that says, “Happy Blogging”:

define('WP_MEMORY_LIMIT', '256M');

You can also increase memory to a higher number, and you can also increase the memory limit for admin tasks, as described in the WordPress codex.

Edit your PHP.ini file

If you have access to your PHP.ini file, change the line in PHP.ini
If your line shows 64M try 256M:

memory_limit = 256M ; Maximum amount of memory a script may consume (64MB)

Edit your .htaccess file

If you don’t have access to PHP.ini try adding this to an .htaccess file:

php_value memory_limit 256M

Contact Your Host

Should you not feel comfortable in trying the above methods, or the above did not work for you, you need to talk to your hosting about having them increase your memory limit.