Scheduler test task The Scheduler test task just sends a mail to a given email address. It is designed to be used for testing purposes. Scheduler sleep task This task does nothing but put PHP to sleep for a number of seconds. It is designed to test multiple executions. Caching framework garbage collection This task calls the garbage collection of configured caching framework caches which use one of the selected backends. This will free some space in cache backends which do not have an internal garbage collection. In case of the default database backend it is advisable to run this task once a day when the database is mostly idle. [OBSOLETE] File Abstraction Layer: Indexing job Runs indexing tasks based on an indexing configuration and a storage/folder information. File Abstraction Layer: Update storage index Updates the Index/Cache Data of a Storage; only needed if changes to the storage are possible outside the backend (FTP, RemoteStorages). File Abstraction Layer: Extract metadata in storage Extracts metadata for all files in storage which have been changed since last run. Table garbage collection Task to delete old entries from specific tables like sys_log. Use $GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['scheduler']['tasks']['tx_scheduler_TableGarbageCollection']['options']['tables'] to configure tables. Refer to the manual for more details. Fileadmin garbage collection This task empties all "_recycler_" folders below fileadmin. This helps free some space in the file system.