This topic describes how to use the Purge Large File Asynchronously function to delete files from an ApsaraDB for RDS instance running AliSQL. This function is designed to ensure database stability by deleting large files asynchronously.
Background information
If your ApsaraDB for RDS instance runs the InnoDB storage engine, directly deleting large files from the instance compromises the stability of your POSIX file system. As a result, InnoDB starts a background thread to delete large files asynchronously. InnoDB renames data files housing tablespaces to identify them as temporary files before starting to delete the tablespaces asynchronously.