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| -rw-r--r-- | docs/upgrade.md | 13 |
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diff --git a/docs/upgrade.md b/docs/upgrade.md index 062e823333..f6d226526a 100644 --- a/docs/upgrade.md +++ b/docs/upgrade.md @@ -85,6 +85,19 @@ process, for example: dpkg -i matrix-synapse-py3_1.3.0+stretch1_amd64.deb ``` +# Upgrading to v1.57.0 + +## Changes to database schema for application services + +Synapse v1.57.0 includes a [change](https://github.com/matrix-org/synapse/pull/12209) to the +way transaction IDs are managed for application services. If your deployment uses a dedicated +worker for application service traffic, **it must be stopped** when the database is upgraded +(which normally happens when the main process is upgraded), to ensure the change is made safely +without any risk of reusing transaction IDs. + +Deployments which do not use separate worker processes can be upgraded as normal. Similarly, +deployments where no applciation services are in use can be upgraded as normal. + # Upgrading to v1.56.0 ## Groups/communities feature has been deprecated |