Transmission
Transmission stores temporary BitTorrent working data in its cache directory, including partially assembled piece data, metadata fetched from magnet links, tracker response state, favicons, and transient session files used to speed up restarts and reduce repeated network requests. Over time these cache files can become stale, oversized, or inconsistent after abrupt shutdowns, disk errors, or client updates, leading to odd torrent behavior even though your actual downloaded files and settings are separate. Kudu removes only Transmission's disposable cache contents so the client can rebuild clean temporary data without touching torrents, preferences, accounts, or completed downloads.
Why clean Transmission?
- Corrupted cached piece data after a crash can leave a torrent stuck on recheck or repeatedly downloading the same few pieces, which shows up as progress that barely moves
- Stale magnet metadata in the cache can delay torrent name and file list retrieval, so magnet links sit on fetching metadata much longer than expected
- Old tracker response state can keep dead or outdated announce information around, causing repeated tracker errors or long waits before peer counts update
- An oversized cache directory from many old torrents increases startup scanning time, making Transmission open slowly before the torrent list becomes responsive
- Leftover temporary files from removed or finished torrents waste disk space and can make it look like Transmission is still using storage long after cleanup in the UI
- Interrupted writes can leave SQLite-style page fragmentation in small internal databases or state files; a rebuild acts like a VACUUM rewrite without deleting rows, reducing bloat and clearing inconsistent temporary state
- Stale session cache after a forced reboot can cause torrents to reappear with wrong transient statuses such as paused, verifying, or missing peers until the cache is rebuilt
Cache paths Kudu targets
Windows
%LocalAppData%/Transmission/cache |
macOS
~/Library/Caches/org.m0k.transmission |
Linux
~/.cache/transmission |
Common questions about Transmission
Download Kudu and reclaim your disk space.
Available on Windows, macOS, and Linux. No account required, no feature gates, no telemetry without consent. All cleaning targets are open source and community-auditable.