Updated: 28 September 2026 · Applies to: cPanel & WHM 138 (Jupiter theme)
If WordPress shows "Allowed memory size exhausted" or runs out of memory in the admin area, increase both PHP's limit and WordPress's own limit.
1. Raise the PHP limit
In cPanel, Software › MultiPHP INI Editor › Basic Mode: set memory_limit to 256M for the domain (on CloudLinux: Software › Select PHP Version › Options).
2. Tell WordPress to use it
Add these lines to wp-config.php, above /* That's all, stop editing! */:
define( 'WP_MEMORY_LIMIT', '256M' ); define( 'WP_MAX_MEMORY_LIMIT', '256M' );
3. Reduce memory use
- Use a caching plugin, and remove plugins you do not use.
- Check Tools › Site Health for plugins or themes that cause problems.
Note: The account's total memory is still limited by your plan (up to 1 GB per account on shared hosting).
