diff options
Diffstat (limited to 'synapse/storage/events.py')
| -rw-r--r-- | synapse/storage/events.py | 81 |
1 files changed, 21 insertions, 60 deletions
diff --git a/synapse/storage/events.py b/synapse/storage/events.py index 0fb190530a..e4d0f8b1a9 100644 --- a/synapse/storage/events.py +++ b/synapse/storage/events.py @@ -37,6 +37,7 @@ from synapse.metrics.background_process_metrics import run_as_background_process from synapse.storage.background_updates import BackgroundUpdateStore from synapse.storage.event_federation import EventFederationStore from synapse.storage.events_worker import EventsWorkerStore +from synapse.storage.state import StateGroupWorkerStore from synapse.types import RoomStreamToken, get_domain_from_id from synapse.util.async_helpers import ObservableDeferred from synapse.util.caches.descriptors import cached, cachedInlineCallbacks @@ -203,7 +204,8 @@ def _retry_on_integrity_error(func): # inherits from EventFederationStore so that we can call _update_backward_extremities # and _handle_mult_prev_events (though arguably those could both be moved in here) -class EventsStore(EventFederationStore, EventsWorkerStore, BackgroundUpdateStore): +class EventsStore(StateGroupWorkerStore, EventFederationStore, EventsWorkerStore, + BackgroundUpdateStore): EVENT_ORIGIN_SERVER_TS_NAME = "event_origin_server_ts" EVENT_FIELDS_SENDER_URL_UPDATE_NAME = "event_fields_sender_url" @@ -1995,70 +1997,29 @@ class EventsStore(EventFederationStore, EventsWorkerStore, BackgroundUpdateStore logger.info("[purge] finding redundant state groups") - # Get all state groups that are only referenced by events that are - # to be deleted. - # This works by first getting state groups that we may want to delete, - # joining against event_to_state_groups to get events that use that - # state group, then left joining against events_to_purge again. Any - # state group where the left join produce *no nulls* are referenced - # only by events that are going to be purged. + # Get all state groups that are referenced by events that are to be + # deleted. We then go and check if they are referenced by other events + # or state groups, and if not we delete them. txn.execute(""" - SELECT state_group FROM - ( - SELECT DISTINCT state_group FROM events_to_purge - INNER JOIN event_to_state_groups USING (event_id) - ) AS sp - INNER JOIN event_to_state_groups USING (state_group) - LEFT JOIN events_to_purge AS ep USING (event_id) - GROUP BY state_group - HAVING SUM(CASE WHEN ep.event_id IS NULL THEN 1 ELSE 0 END) = 0 + SELECT DISTINCT state_group FROM events_to_purge + INNER JOIN event_to_state_groups USING (event_id) """) - state_rows = txn.fetchall() - logger.info("[purge] found %i redundant state groups", len(state_rows)) - - # make a set of the redundant state groups, so that we can look them up - # efficiently - state_groups_to_delete = set([sg for sg, in state_rows]) - - # Now we get all the state groups that rely on these state groups - logger.info("[purge] finding state groups which depend on redundant" - " state groups") - remaining_state_groups = [] - unreferenced_state_groups = 0 - for i in range(0, len(state_rows), 100): - chunk = [sg for sg, in state_rows[i:i + 100]] - # look for state groups whose prev_state_group is one we are about - # to delete - rows = self._simple_select_many_txn( - txn, - table="state_group_edges", - column="prev_state_group", - iterable=chunk, - retcols=["state_group"], - keyvalues={}, - ) - - for row in rows: - sg = row["state_group"] - - if sg in state_groups_to_delete: - # exclude state groups we are about to delete: no point in - # updating them - continue + referenced_state_groups = set(sg for sg, in txn) + logger.info( + "[purge] found %i referenced state groups", + len(referenced_state_groups), + ) - if not self._is_state_group_referenced(txn, sg): - # Let's also delete unreferenced state groups while we're - # here, since otherwise we'd need to de-delta them - state_groups_to_delete.add(sg) - unreferenced_state_groups += 1 - continue + logger.info("[purge] finding state groups that can be deleted") - remaining_state_groups.append(sg) + state_groups_to_delete, remaining_state_groups = self._find_unreferenced_groups( + txn, referenced_state_groups, + ) logger.info( - "[purge] found %i extra unreferenced state groups to delete", - unreferenced_state_groups, + "[purge] found %i state groups to delete", + len(state_groups_to_delete), ) logger.info( @@ -2109,11 +2070,11 @@ class EventsStore(EventFederationStore, EventsWorkerStore, BackgroundUpdateStore logger.info("[purge] removing redundant state groups") txn.executemany( "DELETE FROM state_groups_state WHERE state_group = ?", - state_rows + ((sg,) for sg in state_groups_to_delete), ) txn.executemany( "DELETE FROM state_groups WHERE id = ?", - state_rows + ((sg,) for sg in state_groups_to_delete), ) logger.info("[purge] removing events from event_to_state_groups") |