Troubleshooting the WordPress Fatal Error: Allowed Memory Size Exhausted

Allowed Memory Size Exhausted


If you’re a WordPress user or developer, you may have encountered the dreaded error message: “Fatal error: Allowed memory size of X bytes exhausted.” This error can be frustrating, but understanding its causes and implementing effective solutions can help you get your website back up and running smoothly. In this article, we’ll explore the reasons behind this error and provide step-by-step instructions on how to troubleshoot and fix it.

When encountering the “Allowed Memory Size Exhausted” fatal error in WordPress, it indicates that your WordPress installation is trying to use more memory than is allocated by the server. This can happen for various reasons, such as poorly optimized plugins or themes, or just because your site has grown and needs more resources. Here are the steps to troubleshoot and fix this issue

Understanding the Error Message:

The error message itself indicates that your WordPress website has exceeded the allowed memory size defined in the PHP configuration. The value ‘X’ represents the specific memory limit that your site has exhausted. The memory limit is set to prevent scripts from consuming excessive server resources, ensuring the overall stability and performance of your website.

Common Causes of the Error:

  1. Inefficient Code: Poorly optimized or inefficient themes and plugins can lead to increased memory consumption, triggering the error. This is especially common when using resource-intensive plugins or themes.

  2. Large Datasets: Processing large amounts of data, such as extensive image galleries or large databases, can strain server resources and exceed the allocated memory limit.

  3. Server Configuration: The server’s PHP configuration may have a relatively low memory limit. This is common in shared hosting environments where server resources are distributed among multiple users.

Troubleshooting Steps:

    1. Identify the Culprit:
      • Start by deactivating all plugins and switching to a default WordPress theme (such as Twenty Twenty-One).
      • Reactivate each plugin one by one and switch themes to pinpoint the one causing the memory exhaustion.
    2. Increase Memory Limit:
      • Edit the wp-config.php file in your WordPress root directory.
      • Add the following line of code just before the “/* That’s all, stop editing! */”
wp memory limit
define('WP_MEMORY_LIMIT', '256M');

Adjust the memory limit value as needed.

PHP.ini Configuration:

    • If you have access to the server’s PHP configuration, locate and edit the php.ini file.
    • Increase the memory limit by modifying the memory_limit directive, e.g., memory_limit = 256M.
memory_limit = 256M

htaccess Modification:

    • Add the following line to your site’s .htaccess file:
PHP memory limit with htaccess
php_value memory_limit 256M
Contact Hosting Provider:
  • If you’re on shared hosting, contact your hosting provider and request a higher memory limit.


  1. Increase the PHP memory limit via wp-config.php, .htaccess, or php.ini.
  2. Check for plugin or theme conflicts.
  3. Optimize your WordPress site.
  4. Contact your hosting provider if necessary.
  5. Enable debugging to get more details on the issue.

Following these steps should help you troubleshoot and resolve the “Allowed Memory Size Exhausted” error in WordPress.

While the “Allowed Memory Size Exhausted” error in WordPress is generally seen as a problem, there are a few indirect benefits to encountering this issue. These benefits are mostly related to the opportunities for optimization and improvement it presents:

Improving User Experience

Faster Load Times

  • Reduced Load Times: Optimization efforts can lead to faster load times, improving the user experience and potentially boosting SEO rankings.
  • Smoother Operations: With adequate memory and optimized components, the site runs more smoothly, leading to fewer crashes and a more reliable user experience.


Encountering the “WordPress Fatal error: Allowed memory size exhausted” message can be daunting, but with a systematic approach, you can identify and resolve the underlying issues. By optimizing code, managing large datasets, and adjusting memory limits, you’ll be able to maintain a stable and efficient WordPress website. If issues persist, consider seeking assistance from a WordPress developer or your hosting provider to ensure your site runs smoothly without exceeding memory limits.

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