History

Erik Johnston 5c9e39e619 Track device list updates per room. (#12321 ) This is a first step in dealing with #7721. The idea is basically that rather than calculating the full set of users a device list update needs to be sent to up front, we instead simply record the rooms the user was in at the time of the change. This will allow a few things: 1. we can defer calculating the set of remote servers that need to be poked about the change; and 2. during `/sync` and `/keys/changes` we can avoid also avoid calculating users who share rooms with other users, and instead just look at the rooms that have changed. However, care needs to be taken to correctly handle server downgrades. As such this PR writes to both `device_lists_changes_in_room` and the `device_lists_outbound_pokes` table synchronously. In a future release we can then bump the database schema compat version to `69` and then we can assume that the new `device_lists_changes_in_room` exists and is handled. There is a temporary option to disable writing to `device_lists_outbound_pokes` synchronously, allowing us to test the new code path does work (and by implication upgrading to a future release and downgrading to this one will work correctly). Note: Ideally we'd do the calculation of room to servers on a worker (e.g. the background worker), but currently only master can write to the `device_list_outbound_pokes` table.		3 years ago
..
common	Support for database schema version ranges (#9933 )	4 years ago
main	Track device list updates per room. (#12321 )	3 years ago
state	Reduce likelihood of Postgres table scanning `state_groups_state`. (#10359 )	3 years ago
README.md	update links to schema doc (#10620 )	3 years ago
__init__.py	Track device list updates per room. (#12321 )	3 years ago

README.md

Synapse Database Schemas

This directory contains the schema files used to build Synapse databases. For more information, see https://matrix-org.github.io/synapse/develop/development/database_schema.html.