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Don't schedule an async task on every sync (#16312)

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Erik Johnston 2023-09-13 11:59:44 +01:00 committed by GitHub
parent be3c7b08a3
commit e9addf6a01
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2 changed files with 27 additions and 11 deletions
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1
changelog.d/16312.misc Normal file
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@ -0,0 +1 @@
Delete device messages asynchronously and in staged batches using the task scheduler.

17
synapse/handlers/sync.py
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@ -362,7 +362,22 @@ class SyncHandler:
# (since we now know that the device has received them)
if since_token is not None:
since_stream_id = since_token.to_device_key
# Delete device messages asynchronously and in batches using the task scheduler
# Fast path: delete a limited number of to-device messages up front.
# We do this to avoid the overhead of scheduling a task for every
# sync.
device_deletion_limit = 100
deleted = await self.store.delete_messages_for_device(
sync_config.user.to_string(),
sync_config.device_id,
since_stream_id,
limit=device_deletion_limit,
)
logger.debug(
"Deleted %d to-device messages up to %d", deleted, since_stream_id
)
# If we hit the limit, schedule a background task to delete the rest.
if deleted >= device_deletion_limit:
await self._task_scheduler.schedule_task(
DELETE_DEVICE_MSGS_TASK_NAME,
resource_id=sync_config.device_id,