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Limit the length of state chains

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This commit is contained in:
Erik Johnston 2016-09-02 10:41:38 +01:00
parent 9e25443db8
commit 598317927c
2 changed files with 106 additions and 43 deletions
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49
synapse/storage/events.py
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@ -497,7 +497,11 @@ class EventsStore(SQLBaseStore):
# insert into the state_group, state_groups_state and
# event_to_state_groups tables.
self._store_mult_state_groups_txn(txn, ((event, context),))
try:
self._store_mult_state_groups_txn(txn, ((event, context),))
except Exception:
logger.exception("")
raise
metadata_json = encode_json(
event.internal_metadata.get_dict()
@ -1543,6 +1547,9 @@ class EventsStore(SQLBaseStore):
)
event_rows = txn.fetchall()
for event_id, state_key in event_rows:
txn.call_after(self._get_state_group_for_event.invalidate, (event_id,))
# We calculate the new entries for the backward extremeties by finding
# all events that point to events that are to be purged
txn.execute(
@ -1571,26 +1578,26 @@ class EventsStore(SQLBaseStore):
# Get all state groups that are only referenced by events that are
# to be deleted.
txn.execute(
"SELECT state_group FROM event_to_state_groups"
" INNER JOIN events USING (event_id)"
" WHERE state_group IN ("
" SELECT DISTINCT state_group FROM events"
" INNER JOIN event_to_state_groups USING (event_id)"
" WHERE room_id = ? AND topological_ordering < ?"
" )"
" GROUP BY state_group HAVING MAX(topological_ordering) < ?",
(room_id, topological_ordering, topological_ordering)
)
state_rows = txn.fetchall()
txn.executemany(
"DELETE FROM state_groups_state WHERE state_group = ?",
state_rows
)
txn.executemany(
"DELETE FROM state_groups WHERE id = ?",
state_rows
)
# txn.execute(
# "SELECT state_group FROM event_to_state_groups"
# " INNER JOIN events USING (event_id)"
# " WHERE state_group IN ("
# " SELECT DISTINCT state_group FROM events"
# " INNER JOIN event_to_state_groups USING (event_id)"
# " WHERE room_id = ? AND topological_ordering < ?"
# " )"
# " GROUP BY state_group HAVING MAX(topological_ordering) < ?",
# (room_id, topological_ordering, topological_ordering)
# )
# state_rows = txn.fetchall()
# txn.executemany(
# "DELETE FROM state_groups_state WHERE state_group = ?",
# state_rows
# )
# txn.executemany(
# "DELETE FROM state_groups WHERE id = ?",
# state_rows
# )
# Delete all non-state
txn.executemany(
"DELETE FROM event_to_state_groups WHERE event_id = ?",