diff options
| -rw-r--r-- | changelog.d/14020.misc | 1 | ||||
| -rw-r--r-- | synapse/storage/databases/main/event_push_actions.py | 58 | ||||
| -rw-r--r-- | synapse/storage/schema/__init__.py | 1 | ||||
| -rw-r--r-- | synapse/storage/schema/main/delta/73/05old_push_actions.sql.postgres | 22 | ||||
| -rw-r--r-- | synapse/storage/schema/main/delta/73/05old_push_actions.sql.sqlite | 24 |
5 files changed, 105 insertions, 1 deletions
diff --git a/changelog.d/14020.misc b/changelog.d/14020.misc new file mode 100644 index 0000000000..85550b307d --- /dev/null +++ b/changelog.d/14020.misc @@ -0,0 +1 @@ +Clear out stale entries in `event_push_actions_staging` table. diff --git a/synapse/storage/databases/main/event_push_actions.py b/synapse/storage/databases/main/event_push_actions.py index 3fdf128d9e..cdc9ee5a37 100644 --- a/synapse/storage/databases/main/event_push_actions.py +++ b/synapse/storage/databases/main/event_push_actions.py @@ -205,6 +205,9 @@ class EventPushActionsWorkerStore(ReceiptsWorkerStore, StreamWorkerStore, SQLBas ): super().__init__(database, db_conn, hs) + # Track when the process started. + self._started_ts = self._clock.time_msec() + # These get correctly set by _find_stream_orderings_for_times_txn self.stream_ordering_month_ago: Optional[int] = None self.stream_ordering_day_ago: Optional[int] = None @@ -224,6 +227,10 @@ class EventPushActionsWorkerStore(ReceiptsWorkerStore, StreamWorkerStore, SQLBas self._rotate_notifs, 30 * 1000 ) + self._clear_old_staging_loop = self._clock.looping_call( + self._clear_old_push_actions_staging, 30 * 60 * 1000 + ) + self.db_pool.updates.register_background_index_update( "event_push_summary_unique_index", index_name="event_push_summary_unique_index", @@ -791,7 +798,7 @@ class EventPushActionsWorkerStore(ReceiptsWorkerStore, StreamWorkerStore, SQLBas # can be used to insert into the `event_push_actions_staging` table. def _gen_entry( user_id: str, actions: Collection[Union[Mapping, str]] - ) -> Tuple[str, str, str, int, int, int, str]: + ) -> Tuple[str, str, str, int, int, int, str, int]: is_highlight = 1 if _action_has_highlight(actions) else 0 notif = 1 if "notify" in actions else 0 return ( @@ -802,6 +809,7 @@ class EventPushActionsWorkerStore(ReceiptsWorkerStore, StreamWorkerStore, SQLBas is_highlight, # highlight column int(count_as_unread), # unread column thread_id, # thread_id column + self._clock.time_msec(), # inserted_ts column ) await self.db_pool.simple_insert_many( @@ -814,6 +822,7 @@ class EventPushActionsWorkerStore(ReceiptsWorkerStore, StreamWorkerStore, SQLBas "highlight", "unread", "thread_id", + "inserted_ts", ), values=[ _gen_entry(user_id, actions) @@ -1340,6 +1349,53 @@ class EventPushActionsWorkerStore(ReceiptsWorkerStore, StreamWorkerStore, SQLBas if done: break + @wrap_as_background_process("_clear_old_push_actions_staging") + async def _clear_old_push_actions_staging(self) -> None: + """Clear out any old event push actions from the staging table for + events that we failed to persist. + """ + + # We delete anything more than an hour old, on the assumption that we'll + # never take more than an hour to persist an event. + delete_before_ts = self._clock.time_msec() - 60 * 60 * 1000 + + if self._started_ts > delete_before_ts: + # We need to wait for at least an hour before we started deleting, + # so that we know it's safe to delete rows with NULL `inserted_ts`. + return + + # We don't have an index on `inserted_ts`, instead we assume that the + # number of "live" rows in `event_push_actions_staging` is small enough + # that an infrequent periodic scan won't cause a problem. + # + # Note: we also delete any columns with NULL `inserted_ts`, this is safe + # as we added a default value to new rows and so they must be at least + # an hour old. + limit = 1000 + sql = """ + DELETE FROM event_push_actions_staging WHERE event_id IN ( + SELECT event_id FROM event_push_actions_staging WHERE + inserted_ts < ? OR inserted_ts IS NULL + LIMIT ? + ) + """ + + def _clear_old_push_actions_staging_txn(txn: LoggingTransaction) -> bool: + txn.execute(sql, (delete_before_ts, limit)) + return txn.rowcount >= limit + + while True: + # Returns true if we have more stuff to delete from the table. + deleted = await self.db_pool.runInteraction( + "_clear_old_push_actions_staging", _clear_old_push_actions_staging_txn + ) + + if not deleted: + return + + # We sleep to ensure that we don't overwhelm the DB. + await self._clock.sleep(1.0) + class EventPushActionsStore(EventPushActionsWorkerStore): EPA_HIGHLIGHT_INDEX = "epa_highlight_index" diff --git a/synapse/storage/schema/__init__.py b/synapse/storage/schema/__init__.py index f29424d17a..4a5c947699 100644 --- a/synapse/storage/schema/__init__.py +++ b/synapse/storage/schema/__init__.py @@ -85,6 +85,7 @@ Changes in SCHEMA_VERSION = 73; events over federation. - Add indexes to various tables (`event_failed_pull_attempts`, `insertion_events`, `batch_events`) to make it easy to delete all associated rows when purging a room. + - `inserted_ts` column is added to `event_push_actions_staging` table. """ diff --git a/synapse/storage/schema/main/delta/73/05old_push_actions.sql.postgres b/synapse/storage/schema/main/delta/73/05old_push_actions.sql.postgres new file mode 100644 index 0000000000..4af1a8470b --- /dev/null +++ b/synapse/storage/schema/main/delta/73/05old_push_actions.sql.postgres @@ -0,0 +1,22 @@ +/* Copyright 2022 The Matrix.org Foundation C.I.C + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +-- Add a column so that we know when a push action was inserted, to make it +-- easier to clear out old ones. +ALTER TABLE event_push_actions_staging ADD COLUMN inserted_ts BIGINT; + +-- We now add a default for *new* rows. We don't do this above as we don't want +-- to have to update every remove with the new default. +ALTER TABLE event_push_actions_staging ALTER COLUMN inserted_ts SET DEFAULT extract(epoch from now()) * 1000; diff --git a/synapse/storage/schema/main/delta/73/05old_push_actions.sql.sqlite b/synapse/storage/schema/main/delta/73/05old_push_actions.sql.sqlite new file mode 100644 index 0000000000..7482dabba2 --- /dev/null +++ b/synapse/storage/schema/main/delta/73/05old_push_actions.sql.sqlite @@ -0,0 +1,24 @@ +/* Copyright 2022 The Matrix.org Foundation C.I.C + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +-- On SQLite we must be in monolith mode and updating the database from Synapse, +-- so its safe to assume that `event_push_actions_staging` should be empty (as +-- over restart an event must either have been fully persisted or we'll +-- recalculate the push actions) +DELETE FROM event_push_actions_staging; + +-- Add a column so that we know when a push action was inserted, to make it +-- easier to clear out old ones. +ALTER TABLE event_push_actions_staging ADD COLUMN inserted_ts BIGINT; |