How to Increase WordPress memory limit
The default value of the WordPress memory limit is set to 256 MB on all most shared servers & sometimes it’s necessary to increase it. To increase it, edit the wp-config.php
Using Filezilla SFTP to your website root directory, access your WordPress files. Next, locate the wp-config.php file in the root directory or folder. Open the wp-config.php file by double-clicking. Select Edit. Next, Locate the following line:
/* That’s all, stop editing! Happy publishing. */
Just above that line, in step five, add this code: define(‘WP_MEMORY_LIMIT’, ‘256M’);
next Select Save. You done it.You have increased your WordPress memory limit.