Why does my WordPress site say allowed memory size exhausted?

This error occurs when a WordPress plugin, theme, or script requests more RAM than your server's allocated PHP memory limit. Host providers enforce default limits to prevent inefficient scripts from crashing shared server hardware.

How much PHP memory limit does WordPress need?

Standard WordPress blogs require around 128MB. However, dynamic websites running WooCommerce, page builders like Elementor, or heavy custom plugins usually require at least 256MB to run without memory exhaustion errors.

Will increasing the PHP memory limit slow down my site?

No, increasing your PHP memory limit gives scripts necessary headroom to execute smoothly. However, if an underlying plugin leaks memory constantly, high resource consumption can slow down overall server responsiveness.

What if editing wp-config.php does not fix the memory limit error?

If updating wp-config.php does not resolve the error, your hosting server is enforcing hard memory limits at the environment level. You must modify your .htaccess file, php.ini file, or ask your host to increase your PHP memory ceiling.

How to Fix WordPress Memory Limit Exceeded Error

Seeing the fatal error 'allowed memory size exhausted' on your WordPress site? Here is a practical guide to increasing your PHP memory limit safely.

Understanding the Fatal Memory Size Exhausted Error

When your website displays a message like 'Fatal error: Allowed memory size of 67108864 bytes exhausted', it means a script or plugin requested more server memory than your PHP configuration allows. WordPress assigns a conservative default memory limit (often 32MB or 64MB), which easily gets overwhelmed by modern themes, page builders, and e-commerce extensions.

This issue frequently surfaces when uploading media files, updating plugins, or performing heavy database queries. Resolving it requires allocating higher PHP memory limits or optimizing script execution across your web environment.

Method 1: Increase PHP Memory via wp-config.php

The quickest way to fix WordPress memory limit exceeded errors is by editing your site's core configuration file. Access your website files using FTP or your hosting control panel File Manager and locate wp-config.php in the root directory.

Open wp-config.php in a code editor.
Scroll down right above the line that reads /* That's all, stop editing! Happy publishing. */.
Paste this code snippet: define('WP_MEMORY_LIMIT', '256M');
Save your file and refresh your WordPress website.

For resource-intensive administrative operations, you can also add define('WP_MAX_MEMORY_LIMIT', '512M'); to grant your dashboard extra processing bandwidth.

Method 2: Adjust Memory Limits in .htaccess or php.ini

If updating wp-config.php fails to clear the error, your hosting provider may enforce memory caps at the web server level. You can override these limits using your .htaccess or php.ini file.

Updating .htaccess (Apache Servers):

Add the following directive to the bottom of your .htaccess file:

php_value memory_limit 256M

Updating php.ini:

If your host grants access to a custom php.ini file, locate or create it in your site's root folder and add:

memory_limit = 256M

If these edits cause a 500 Internal Server Error, remove the lines immediately and contact your host or a technical team.

Method 3: Diagnose Memory-Hungry Plugins and PHP Version

Increasing memory limits offers an immediate fix, but ignoring bloated code can cause ongoing server bottlenecks. Efficient websites rarely exhaust 256MB under normal traffic.

Audit Active Plugins: Deactivate plugins individually to identify which plugin spikes server memory usage.
Upgrade PHP Version: Ensure your server runs PHP 8.1 or higher. Newer PHP versions handle memory allocation significantly better than legacy releases.
Clear Database Junk: Unused transients and unindexed queries consume massive memory during request execution.

If managing server configuration and debugging code errors consumes too much time, explore Glory Software Technologies WordPress maintenance retainers to ensure your site remains optimized and secure.

When to Upgrade Hosting or Seek Managed WordPress Care

When memory errors persist despite configuration changes, your server has likely hit its physical RAM hardware limit. Budget shared hosting packages strictly cap resource consumption regardless of software directives.

Upgrading your infrastructure or partnering with dedicated technical specialists ensures your digital storefront scales smoothly. At Glory Software Technologies, we perform complete code audits, database indexing, and server tuning to stop technical glitches before they impact your sales.