Fatal error: Allowed memory size of 41943040 bytes exhausted (tried to allocate 20480 bytes)

Add the following at the top of wp-config.php:

ini_set('memory_limit','128M');

Although you should use WP_MEMORY_LIMIT when you can, we see in /wp-includes/default-constants.php that WordPress doesn’t do much more than use ini_set itself. Note: This is just one more thing to try, but you’ll likely end up having to have your host fix this issue.

Related Posts:

  1. WordPress PHP error handling and reporting in production environment
  2. Out of memory errors : how best to track them down
  3. Fatal error trace not shown in development setup
  4. Best practice for versioning wp-config.php?
  5. What’s the difference between WP_MEMORY_LIMIT and WP_MAX_MEMORY_LIMIT?
  6. Undefined offset: 0 in > […] /wp-includes/capabilities.php on line 1067
  7. Turn Off Automatic Trash Deletion?
  8. Upgrading PHP version results in “Use of undefined constant WP_CONTENT_DIR” warning?
  9. How can I change preview URL?
  10. Missing a temporary folder despite settings in wp-config.php
  11. How to use live images on local install?
  12. Syntax of FS_CHMOD_DIR and FS_CHMOD_FILE
  13. Call to undefined function error after adding add_filter to wp-config
  14. WordPress error – PHP Fatal error: Uncaught Error: Call to undefined function register_block_type_from_metadata()
  15. How to set up gmail SMTP in WordPress
  16. error:-Cannot modify header information – headers already sent by
  17. Notice: Constant already defined in wp-config.php on (non-existent) line?
  18. How to update WordPress from the latest trunk
  19. how to use is_admin in wp-config.php
  20. Locked out of WordPress Site Admin after enabling Force SSL on WordPress Https (SSL)
  21. Set wp-content folder to Dropbox folder
  22. Including a 3rd party library in WordPress which needs to be accessible by wp-config
  23. wp-config.php being deleted
  24. Get WP CLI to hide debug warnings and notices in JSON output, same setting as website
  25. What is this file: wp-config-wpe.php?
  26. How can I make wordpress suppress mysql errors?
  27. How to customize the critical error message?
  28. enable SFTP via SSH keys in wordpress
  29. Why do I get a WAMP homepage when clicking on specific website’s URL on LocalHost?
  30. Creating the wp-config.php file manually
  31. Can I delete `wp-config-sample.php` after installing and configuring WordPress?
  32. Can’t Change Theme And White Screen When Activating Any Plugin
  33. How to reliably set file/folder permissions?
  34. Error establishing a database connection on Installation
  35. “There doesn’t seem to be a wp-config.php file.” despite wp-config.php in root
  36. Moving WP from local server to live, error establishing a db connection
  37. Multiple wp-config.php files in one home directory
  38. Why edits to wp-config.php must come before “That’s all” comment
  39. error log cluttered with undefined DB_USER wp-admin/setup-config.php
  40. Is it possible to override the ABSPATH constant
  41. How to stop fatal error when loading theme template file directly
  42. Should I change wp-config for SSL?
  43. Redefine cookie domain for subdomains
  44. HTTP Error after finishing uploading a video that is bigger than 64 MB -> After raising the upload limit manually in the wp-config file
  45. multiple language directories
  46. Error in database connection [closed]
  47. Getting error when using wp_insert_post()
  48. Conflict with wp_homeurl, wp_siteurl and admin interface settings
  49. Call to undefined function add_menu_page() on theme activation
  50. error messages in dashboard login
  51. where should I write constants in wordpress?
  52. Issues copying site into local machine
  53. Autosave interval remains default despite wp-config.php defines
  54. Carriage Return control character (^M) found in wp-config-sample.php
  55. Need help fixing my wp-config file [closed]
  56. Why was my new WordPress installation’s config page publicly viewable when first installed?
  57. WP_MEMORY_LIMIT didn’t work in wp-config, only within default-constants.php
  58. PHP error when trying to upload .mp3 files via Media Library [closed]
  59. Cookie set without HttpOnly flag
  60. Define option outside wp-config.php (on WordPress.com)
  61. Site lost all formatting when I attempted to migrate to Bluehost [closed]
  62. Moving wp-config.php one level up – 500 error – Nginx [closed]
  63. What should index.php contain on Synology NAS to get external access to WordPress to work?
  64. Remote server does not read `WP_HOME` from wp-config.php when local server does
  65. Concerns over wp-config file [closed]
  66. Read wp-config without loading the rest of WordPress – i.e. wp-settings, etc
  67. Proper way to have multiple installs with a single database
  68. How turn on error reporting without reset?
  69. WordPress installed on a Sub-directory
  70. $post->id vs $post->ID problem after using WordPress config bootstrap
  71. How to stage a redesigned site on a new webhost while the original site is still live? [closed]
  72. Replace old theme that understand old css (vcex_icon_box css_animation)
  73. Fatal error: Uncaught Error: Call to undefined function add_action()
  74. Fatal Error when trying to load Permalinks page on WP admin [closed]
  75. WP_Fatal_Error_Handler OR WP_Error OR try/catch
  76. Need help re-connecting local WP-config file to local database
  77. wp-config.php randomly will reset to wp-config-sample.php
  78. How to fix wp-login.php gives error 500 after migration?
  79. Define new constants in wp-config
  80. sudden changing of host IP result in crash of the site
  81. Move wp-content outside root
  82. Can you define readability settings in wp-config.php?
  83. WordPress displays 500 error on PHP errors
  84. Unable to change WordPress language (WordPress 4.2.2)
  85. WordPress Redirect on Name Change
  86. Is there any reason why using the same wp-config file might not work in MAMP?
  87. WordPress won’t display errors at all
  88. Plugin won’t activate, fatal error (widget class not found)
  89. blank white page in admin, white space hunting?
  90. Best function/method to access wp-config?
  91. Fatal error: Cannot declare class WP_User_Request, because the name is already in use?
  92. WordPress still requires FTP information
  93. WordPress doesn’t recognise my email address and I’m missing the wp-config file in PHPmyadmin cPanel to make alterations
  94. WordPress White Screen Error
  95. Why would changing ports from 80 to 8080 cause wordpress to act unexpectedly?
  96. Fatal error: require(): Failed opening required ‘load.php’
  97. Other pages fine but wp-admin showing ERR_TOO_MANY_REDIRECTS Error
  98. Better error messages upon critical errors – HTTP Error 500
  99. max_input_vars not updating through wp-config
  100. Disabling zlib compression and enforcing gzip

Leave a Comment