The document discusses gentle_unlink, a Perl script created by OGATA Tetsuji that slowly deletes files over time instead of immediately to avoid spikes in disk activity. It can delete files gradually in the background while the disk is idle. This helps improve performance and reduce wear when deleting large numbers of files at once, such as when removing old log files or database tables. The author recommends it as an alternative to commands like rm and truncate that delete files all at once.