Fatal error: Out of memory (allocated 20971520) (tried to allocate 32768 bytes) in /var/www/magento2/vendor/magento/module-eav/Model/ResourceModel/Entity/Attribute/Collection.php on line 462

Fatal error: Out of memory (allocated 20971520) (tried to allocate 4096 bytes) in /var/www/magento2/vendor/magento/framework/Session/SaveHandler.php on line 131

Fatal error: Out of memory (allocated 20971520) (tried to allocate 4096 bytes) in Unknown on line 0