Running a WordPress website can be a smooth experience until you encounter a “Memory Limit Error.” This error typically appears as a message like “Fatal error: Allowed memory size exhausted” and can be frustrating for website owners and administrators. However, fear not, as this guide will walk you through the steps to diagnose and resolve this issue. By the end, you’ll be equipped to handle memory limit errors like a pro.

Understanding the Memory Limit Error

WordPress, like any other software, requires a certain amount of memory (RAM) to function correctly. When your website surpasses the allocated memory limit, it results in a fatal error. This can happen due to various reasons, such as inefficient code, resource-intensive plugins, or insufficient server resources.

Step-by-Step Guide to Fixing Memory Limit Errors

Let’s dive into the practical steps to fix a memory limit error and get your WordPress site back on track:

1. Identify the Error

  • Check Error Message: When you encounter a memory limit error, take note of the error message. It often contains helpful information, including the file and line where the error occurred.

2. Increase PHP Memory Limit

  • Edit wp-config.php: Access your WordPress site’s root directory using an FTP client or your hosting control panel. Locate the wp-config.php file and edit it.
  • Define a New Limit: Add the following line of code just before the line that says “That’s all, stop editing! Happy blogging”:phpCopy codedefine('WP_MEMORY_LIMIT', '256M'); You can adjust the value (256M in this example) based on your requirements. Most hosting providers allow values between 64M and 256M.

3. Check Your Plugins

  • Deactivate Plugins: Some plugins can be memory hogs. Deactivate all your plugins and check if the error persists. If it disappears, reactivate them one by one to identify the problematic plugin.
  • Replace Resource-Intensive Plugins: If you discover that a specific plugin is causing the issue, consider finding an alternative with lower memory usage.

4. Optimize Your Theme

  • Switch to a Default Theme: Temporarily switch to a default WordPress theme (e.g., Twenty Twenty-One). If the error disappears, it suggests that your current theme might be the culprit. Consider contacting the theme developer for assistance or using a more efficient theme.

5. Update WordPress and Plugins

  • Keep Software Updated: Ensure that your WordPress core, themes, and plugins are all up to date. Developers often release updates that include bug fixes and performance improvements.

6. Check Your Hosting

  • Contact Hosting Support: If none of the above steps work, reach out to your hosting provider’s support team. They can assist with server-related issues and may adjust your server’s PHP memory limit if necessary.

7. Implement Caching

  • Use Caching Plugins: Caching plugins like W3 Total Cache or WP Super Cache can help reduce the memory usage on your site and improve its performance.

8. Optimize Your Code

  • Review Custom Code: If you have custom code on your site, review it for inefficiencies. Poorly coded themes or plugins can consume more memory than necessary.


Encountering a memory limit error in WordPress can be daunting, but it’s a manageable challenge with the right approach. By following the steps outlined in this guide, you can diagnose the issue and take appropriate action to resolve it. Remember to back up your website before making any significant changes and consider seeking professional help if needed. With persistence and a systematic approach, you can ensure your WordPress site operates smoothly and efficiently, even in the face of memory limit errors.