Split up device_lists_outbound_pokes table for faster updates.

This commit is contained in:
Erik Johnston 2017-06-07 11:02:38 +01:00
parent 6f83c4537c
commit 65f0513a33
2 changed files with 57 additions and 58 deletions

View File

@ -37,10 +37,6 @@ class DeviceStore(SQLBaseStore):
max_entries=10000,
)
self._clock.looping_call(
self._prune_old_outbound_device_pokes, 60 * 60 * 1000
)
self.register_background_index_update(
"device_lists_stream_idx",
index_name="device_lists_stream_user_id",
@ -368,7 +364,7 @@ class DeviceStore(SQLBaseStore):
prev_sent_id_sql = """
SELECT coalesce(max(stream_id), 0) as stream_id
FROM device_lists_outbound_pokes
FROM device_lists_outbound_last_success
WHERE destination = ? AND user_id = ? AND stream_id <= ?
"""
@ -510,32 +506,43 @@ class DeviceStore(SQLBaseStore):
)
def _mark_as_sent_devices_by_remote_txn(self, txn, destination, stream_id):
# First we DELETE all rows such that only the latest row for each
# (destination, user_id is left. We do this by selecting first and
# deleting.
# We update the device_lists_outbound_last_success with the successfully
# poked users. We do the join to see which users need to be inserted and
# which updated.
sql = """
SELECT user_id, coalesce(max(stream_id), 0) FROM device_lists_outbound_pokes
WHERE destination = ? AND stream_id <= ?
SELECT user_id, coalesce(max(o.stream_id), 0), (max(s.stream_id) IS NOT NULL)
FROM device_lists_outbound_pokes as o
LEFT JOIN device_lists_outbound_last_success as s
USING (destination, user_id)
WHERE destination = ? AND o.stream_id <= ?
GROUP BY user_id
HAVING count(*) > 1
"""
txn.execute(sql, (destination, stream_id,))
rows = txn.fetchall()
sql = """
DELETE FROM device_lists_outbound_pokes
WHERE destination = ? AND user_id = ? AND stream_id < ?
UPDATE device_lists_outbound_last_success
SET stream_id = ?
WHERE destination = ? AND user_id = ?
"""
txn.executemany(
sql, ((destination, row[0], row[1],) for row in rows)
sql, ((row[1], destination, row[0],) for row in rows if row[2])
)
# Mark everything that is left as sent
sql = """
UPDATE device_lists_outbound_pokes SET sent = ?
INSERT INTO device_lists_outbound_last_success
(destination, user_id, stream_id) VALUES (?, ?, ?)
"""
txn.executemany(
sql, ((destination, row[0], row[1],) for row in rows if not row[2])
)
# Delete all sent outbound pokes
sql = """
DELETE FROM device_lists_outbound_pokes
WHERE destination = ? AND stream_id <= ?
"""
txn.execute(sql, (True, destination, stream_id,))
txn.execute(sql, (destination, stream_id,))
@defer.inlineCallbacks
def get_user_whose_devices_changed(self, from_key):
@ -634,44 +641,3 @@ class DeviceStore(SQLBaseStore):
def get_device_stream_token(self):
return self._device_list_id_gen.get_current_token()
def _prune_old_outbound_device_pokes(self):
"""Delete old entries out of the device_lists_outbound_pokes to ensure
that we don't fill up due to dead servers. We keep one entry per
(destination, user_id) tuple to ensure that the prev_ids remain correct
if the server does come back.
"""
yesterday = self._clock.time_msec() - 24 * 60 * 60 * 1000
def _prune_txn(txn):
select_sql = """
SELECT destination, user_id, max(stream_id) as stream_id
FROM device_lists_outbound_pokes
GROUP BY destination, user_id
HAVING min(ts) < ? AND count(*) > 1
"""
txn.execute(select_sql, (yesterday,))
rows = txn.fetchall()
if not rows:
return
delete_sql = """
DELETE FROM device_lists_outbound_pokes
WHERE ts < ? AND destination = ? AND user_id = ? AND stream_id < ?
"""
txn.executemany(
delete_sql,
(
(yesterday, row[0], row[1], row[2])
for row in rows
)
)
logger.info("Pruned %d device list outbound pokes", txn.rowcount)
return self.runInteraction(
"_prune_old_outbound_device_pokes", _prune_txn
)

View File

@ -0,0 +1,33 @@
/* Copyright 2017 Vector Creations Ltd
*
* 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.
*/
-- Table of last stream_id that we sent to destination for user_id. This is
-- used to fill out the `prev_id` fields of outbound device list updates.
CREATE TABLE device_lists_outbound_last_success (
destination TEXT NOT NULL,
user_id TEXT NOT NULL,
stream_id BIGINT NOT NULL
);
INSERT INTO device_lists_outbound_last_success
SELECT destination, user_id, coalesce(max(stream_id), 0) as stream_id
FROM device_lists_outbound_pokes
WHERE sent = (1 = 1) -- sqlite doesn't have inbuilt boolean values
GROUP BY destination, user_id;
CREATE INDEX device_lists_outbound_last_success_idx ON device_lists_outbound_last_success(
destination, user_id, stream_id
);