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| author | Brendan Abolivier <babolivier@matrix.org> | 2020-05-07 11:35:23 +0200 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-05-07 10:35:23 +0100 |
| commit | d9b8d274949df7356e880a67d3aac1b25613ab1f (patch) | |
| tree | 8f2af8762b9e13eec493e288c9a7b6c5c55892bb | |
| parent | Improve per-block CPU and DB usage metrics (#7426) (diff) | |
| download | synapse-d9b8d274949df7356e880a67d3aac1b25613ab1f.tar.xz | |
Add a configuration setting for the dummy event threshold (#7422)
Add dummy_events_threshold which allows configuring the number of forward extremities a room needs for Synapse to send forward extremities in it.
| -rw-r--r-- | changelog.d/7422.feature | 1 | ||||
| -rw-r--r-- | docs/sample_config.yaml | 12 | ||||
| -rw-r--r-- | synapse/config/server.py | 15 | ||||
| -rw-r--r-- | synapse/handlers/message.py | 4 |
4 files changed, 31 insertions, 1 deletions
diff --git a/changelog.d/7422.feature b/changelog.d/7422.feature new file mode 100644 index 0000000000..d6d5bb2169 --- /dev/null +++ b/changelog.d/7422.feature @@ -0,0 +1 @@ +Add a configuration setting to tweak the threshold for dummy events. diff --git a/docs/sample_config.yaml b/docs/sample_config.yaml index fc970986c6..98ead7dc0e 100644 --- a/docs/sample_config.yaml +++ b/docs/sample_config.yaml @@ -253,6 +253,18 @@ listeners: # bind_addresses: ['::1', '127.0.0.1'] # type: manhole +# Forward extremities can build up in a room due to networking delays between +# homeservers. Once this happens in a large room, calculation of the state of +# that room can become quite expensive. To mitigate this, once the number of +# forward extremities reaches a given threshold, Synapse will send an +# org.matrix.dummy_event event, which will reduce the forward extremities +# in the room. +# +# This setting defines the threshold (i.e. number of forward extremities in the +# room) at which dummy events are sent. The default value is 10. +# +#dummy_events_threshold: 5 + ## Homeserver blocking ## diff --git a/synapse/config/server.py b/synapse/config/server.py index c6d58effd4..6d88231843 100644 --- a/synapse/config/server.py +++ b/synapse/config/server.py @@ -505,6 +505,9 @@ class ServerConfig(Config): "cleanup_extremities_with_dummy_events", True ) + # The number of forward extremities in a room needed to send a dummy event. + self.dummy_events_threshold = config.get("dummy_events_threshold", 10) + self.enable_ephemeral_messages = config.get("enable_ephemeral_messages", False) # Inhibits the /requestToken endpoints from returning an error that might leak @@ -823,6 +826,18 @@ class ServerConfig(Config): # bind_addresses: ['::1', '127.0.0.1'] # type: manhole + # Forward extremities can build up in a room due to networking delays between + # homeservers. Once this happens in a large room, calculation of the state of + # that room can become quite expensive. To mitigate this, once the number of + # forward extremities reaches a given threshold, Synapse will send an + # org.matrix.dummy_event event, which will reduce the forward extremities + # in the room. + # + # This setting defines the threshold (i.e. number of forward extremities in the + # room) at which dummy events are sent. The default value is 10. + # + #dummy_events_threshold: 5 + ## Homeserver blocking ## diff --git a/synapse/handlers/message.py b/synapse/handlers/message.py index a324f09340..a622a600b4 100644 --- a/synapse/handlers/message.py +++ b/synapse/handlers/message.py @@ -419,6 +419,8 @@ class EventCreationHandler(object): self._ephemeral_events_enabled = hs.config.enable_ephemeral_messages + self._dummy_events_threshold = hs.config.dummy_events_threshold + @defer.inlineCallbacks def create_event( self, @@ -1085,7 +1087,7 @@ class EventCreationHandler(object): """ self._expire_rooms_to_exclude_from_dummy_event_insertion() room_ids = await self.store.get_rooms_with_many_extremities( - min_count=10, + min_count=self._dummy_events_threshold, limit=5, room_id_filter=self._rooms_to_exclude_from_dummy_event_insertion.keys(), ) |