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--- | ||
date: '2022-12-07' | ||
title: Synapse 1.73 released | ||
categories: | ||
- Releases | ||
author: Mathieu Velten | ||
--- | ||
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And here is another update to your beloved Matrix homeserver implementation, [Synapse | ||
1.73](https://github.com/matrix-org/synapse/releases/tag/v1.73.0). | ||
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## Announcements | ||
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### Legacy Prometheus metric names removed | ||
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When releasing [Synapse 1.69](https://matrix.org/blog/2022/10/17/synapse-1-69-released#upcoming-removal-of-deprecated-prometheus-metric-names) | ||
a couple of months ago, we also announced the removal of old Prometheus metrics that have been replaced by more aptly named ones. | ||
he list of these metrics can be found [here](https://matrix-org.github.io/synapse/v1.73/metrics-howto.html#renaming-of-metrics--deprecation-of-old-names-in-12). | ||
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Synapse 1.73 implements the final phase of this plan and entirely removes support for those metrics. As a result, | ||
the `enable_legacy_metrics` configuration option, which was introduced in | ||
[Synapse 1.71](https://matrix.org/blog/2022/11/22/synapse-1-72-released#announcements), has also been removed. | ||
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Server administrators who are still relying on these legacy metric names are encouraged to update their dashboards at their earliest convenience. | ||
For more information, please refer to the [upgrade notes](https://matrix-org.github.io/synapse/v1.73/upgrade#legacy-prometheus-metric-names-have-now-been-removed). | ||
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## The new stuff | ||
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### Performance | ||
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A bunch of performance improvements have been included in this release, specifically around | ||
the [`/messages`](https://spec.matrix.org/v1.5/client-server-api/#get_matrixclientv3roomsroomidmessages) endpoint. | ||
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[Improvements to event filtering on the client-server API](https://github.com/matrix-org/synapse/pull/14527) gave the matrix.org homeserver a first nice bump as visible on this graph: | ||
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![](/blog/img/2022-12-07-apdex-filter-events-improvement.png) | ||
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Various optimizations around [fetching](https://github.com/matrix-org/synapse/pull/14491) [bundled](https://github.com/matrix-org/synapse/pull/14508) | ||
[aggregations](https://github.com/matrix-org/synapse/pull/14510) resulted in yet another nice improvement: | ||
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[![](/blog/img/2022-12-07-bundled-aggregations-improvement.png)](/blog/img/2022-12-07-bundled-aggregations-improvement.png) | ||
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Note that the graph from the first image, and the second graph from the second image are [apdexes](https://en.wikipedia.org/wiki/Apdex), which | ||
is a measure that shows improvement when it goes up (as opposed to e.g. response times, which improve | ||
when they go down). | ||
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### Extensible Events experimental support | ||
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Experimental support for Extensible Events has landed in Synapse. | ||
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This is exciting since this global rework of events presentation has been in talks | ||
[for a while](https://github.com/matrix-org/matrix-spec-proposals/pull/1767), and | ||
having an implementation to experiment with greatly helps bringing the feature | ||
closer to completion. | ||
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Note that this support is still very much experimental as the related MSCs are still | ||
under review and could change at any time, and therefore not recommended for use | ||
in production. | ||
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## Everything else | ||
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See the full [changelog](https://github.com/matrix-org/synapse/releases/tag/v1.73.0), for a | ||
complete list of changes in the release. Also please have a look at the [upgrade | ||
notes](https://matrix-org.github.io/synapse/v1.73/upgrade#upgrading-to-v1730) for this version. | ||
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Synapse is a Free and Open Source Software project, and we'd like to extend our | ||
thanks to everyone who contributed to this release, including (in no particular | ||
order) [schmop](https://github.com/schmop), [Ashish Kumar](https://github.com/ashfame), | ||
[realtyem](https://github.com/realtyem), and [Brennan Chapman](https://github.com/chapb) | ||
as well as anyone helping us make Synapse better by sharing their feedback and reporting issues. | ||
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