Fixing e debug Magento problems due to updating

1) When you upload the db site (by PHPMyAdmin or via SSH), the following MySQL error occurs: - Limits for the `catalog_eav_attribute` table ALTER TABLE `catalog_eav_attribute` ADD CONSTRAINT `FK_CATALOG_EAV_ATTRIBUTE_ATTRIBUTE_ID_EAV_ATTRIBUTE_ATTRIBUTE_ID` FOREIGN KEY (` attribute_id`) REFERENCES `eav_attribute` (` attribute_id`) ON DELETE CASCADE ON UPDATE CASCADE; 2) The web hosting space occupied by the site grows daily too much. It seems there is a problem because "public_hmtl" directory grows too fast. I can not understand what is the cause. 3) The price rules, disappear every two days. The problem appeared after Magento was updated to version 1.9.3.8. It is therefore necessary to renew them every two days. It seems that the problem is due to the CRON ([login to view URL] or [login to view URL])