Fatal error: Out of memory (allocated 18874368) (tried to allocate 16384 bytes) in /home/procases/magento2/vendor/magento/framework/DB/Statement/Pdo/Mysql.php on line 91

Fatal error: Out of memory (allocated 18874368) (tried to allocate 65536 bytes) in /home/procases/magento2/vendor/composer/ClassLoader.php on line 444