Speed up deleting device messages (#16643)

Keeping track of a lower bound of stream ID where we've deleted everything below makes the queries much faster. Otherwise, every time we scan for rows to delete we'd re-scan across all the rows that have previously deleted (until the next table VACUUM).

1 files changed, 1 insertions, 1 deletions

diff --git a/synapse/util/task_scheduler.py b/synapse/util/task_scheduler.py

index caf13b3474..29c561e555 100644
--- a/synapse/util/task_scheduler.py
+++ b/synapse/util/task_scheduler.py
@@ -193,7 +193,7 @@ class TaskScheduler:
         result: Optional[JsonMapping] = None,
         error: Optional[str] = None,
     ) -> bool:
-        """Update some task associated values. This is exposed publically so it can
+        """Update some task associated values. This is exposed publicly so it can
         be used inside task functions, mainly to update the result and be able to
         resume a task at a specific step after a restart of synapse.