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Synapse database maintenance tools
This blog post by Victor Berger explains how to use many of the tools listed on this page: https://levans.fr/shrink-synapse-database.html
The purge remote media API allows server admins to purge old cached remote media.
There is no purge API for local media because you may be the only one with a copy. If you are sure you want to delete local media you could use something like the following to delete media that hasn't been accessed in a while.
find /path/to/synapse/media_store/local_content -atime +365 -delete
find /path/to/synapse/media_store/local_thumbnails -atime +365 -delete
This will delete media that hasn't been accessed in 365 days.
Warning, check noatime flag: You also have to double-check that the filesystem where synapse's media store don't have noatime flag. Check it with mount, noatime is something that is usually enabled by default to reduce read-write operations in the filesystem for a feature is not so demanded.
The purge history API allows server admins to purge historic events from their database, reclaiming disk space.
- this project is unmantained and dangerous
- USE WITH CAUTION. It may cause database corruption (see https://github.com/matrix-org/synapse/issues/7305 for example).
- "Our team hasn't used any of these scripts for some time (possibly years) (...) if anyone wants to volunteer to maintain this repo I'd be happy to transfer ownership.
Cleans a synapse Postgres database of deleted messages and abandoned rooms.
Delete images and thumbnails created by URL previews in Synapse
NOTE: This is not required anymore as of Synapse 0.24, it now deletes those images by itself.
Tool for compressing (deduplicating) state_groups_state table.
Some easy SQL that reports useful stat about Matrix Synapse database.