From 950807d93a264b6d10ece386d227dc4069f7d0da Mon Sep 17 00:00:00 2001 From: Neil Johnson Date: Fri, 3 Aug 2018 13:49:53 +0100 Subject: [PATCH] fix caching and tests --- synapse/app/homeserver.py | 1 - synapse/storage/monthly_active_users.py | 91 ++++++++++------------ tests/storage/test_monthly_active_users.py | 50 ++++++++---- 3 files changed, 80 insertions(+), 62 deletions(-) diff --git a/synapse/app/homeserver.py b/synapse/app/homeserver.py index 7d4ea493bc..3a67db8b30 100755 --- a/synapse/app/homeserver.py +++ b/synapse/app/homeserver.py @@ -64,7 +64,6 @@ from synapse.rest.media.v0.content_repository import ContentRepoResource from synapse.server import HomeServer from synapse.storage import are_all_users_on_domain from synapse.storage.engines import IncorrectDatabaseSetup, create_engine -from synapse.storage.monthly_active_users import MonthlyActiveUsersStore from synapse.storage.prepare_database import UpgradeDatabaseException, prepare_database from synapse.util.caches import CACHE_SIZE_FACTOR from synapse.util.httpresourcetree import create_resource_tree diff --git a/synapse/storage/monthly_active_users.py b/synapse/storage/monthly_active_users.py index 2872ba4cae..d06c90cbcc 100644 --- a/synapse/storage/monthly_active_users.py +++ b/synapse/storage/monthly_active_users.py @@ -1,6 +1,21 @@ +# -*- coding: utf-8 -*- +# Copyright 2018 New Vector +# +# 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. + from twisted.internet import defer -from synapse.util.caches.descriptors import cachedInlineCallbacks -from synapse.storage.engines import PostgresEngine, Sqlite3Engine + +from synapse.util.caches.descriptors import cached, cachedInlineCallbacks from ._base import SQLBaseStore @@ -9,7 +24,7 @@ class MonthlyActiveUsersStore(SQLBaseStore): def __init__(self, dbconn, hs): super(MonthlyActiveUsersStore, self).__init__(None, hs) self._clock = hs.get_clock() - self.max_mau_value = hs.config.max_mau_value + self.hs = hs def reap_monthly_active_users(self): """ @@ -19,62 +34,41 @@ class MonthlyActiveUsersStore(SQLBaseStore): Defered() """ def _reap_users(txn): + thirty_days_ago = ( int(self._clock.time_msec()) - (1000 * 60 * 60 * 24 * 30) ) - if isinstance(self.database_engine, PostgresEngine): - sql = """ - DELETE FROM monthly_active_users - WHERE timestamp < ? - RETURNING user_id - """ - txn.execute(sql, (thirty_days_ago,)) - res = txn.fetchall() - for r in res: - self.is_user_monthly_active.invalidate(r) + sql = "DELETE FROM monthly_active_users WHERE timestamp < ?" - sql = """ - DELETE FROM monthly_active_users - ORDER BY timestamp desc - LIMIT -1 OFFSET ? - RETURNING user_id - """ - txn.execute(sql, (self.max_mau_value,)) - res = txn.fetchall() - for r in res: - self.is_user_monthly_active.invalidate(r) - print r - self.get_monthly_active_count.invalidate() - elif isinstance(self.database_engine, Sqlite3Engine): - sql = "DELETE FROM monthly_active_users WHERE timestamp < ?" + txn.execute(sql, (thirty_days_ago,)) + sql = """ + DELETE FROM monthly_active_users + ORDER BY timestamp desc + LIMIT -1 OFFSET ? + """ + txn.execute(sql, (self.hs.config.max_mau_value,)) - txn.execute(sql, (thirty_days_ago,)) - sql = """ - DELETE FROM monthly_active_users - ORDER BY timestamp desc - LIMIT -1 OFFSET ? - """ - txn.execute(sql, (self.max_mau_value,)) + res = self.runInteraction("reap_monthly_active_users", _reap_users) + # It seems poor to invalidate the whole cache, Postgres supports + # 'Returning' which would allow me to invalidate only the + # specific users, but sqlite has no way to do this and instead + # I would need to SELECT and the DELETE which without locking + # is racy. + # Have resolved to invalidate the whole cache for now and do + # something about it if and when the perf becomes significant + self.is_user_monthly_active.invalidate_all() + self.get_monthly_active_count.invalidate_all() + return res - # It seems poor to invalidate the whole cache, but the alternative - # is to select then delete which has its own problems. - # It seems unlikely that anyone using this feature on large datasets - # would be using sqlite and if they are then there will be - # larger perf issues than this one to encourage an upgrade to postgres. - - self.is_user_monthly_active.invalidate_all() - self.get_monthly_active_count.invalidate_all() - - return self.runInteraction("reap_monthly_active_users", _reap_users) - - @cachedInlineCallbacks(num_args=0) + @cached(num_args=0) def get_monthly_active_count(self): """ Generates current count of monthly active users.abs Return: Defered(int): Number of current monthly active users """ + def _count_users(txn): sql = "SELECT COALESCE(count(*), 0) FROM monthly_active_users" @@ -91,7 +85,7 @@ class MonthlyActiveUsersStore(SQLBaseStore): Deferred(bool): True if a new entry was created, False if an existing one was updated. """ - return self._simple_upsert( + self._simple_upsert( desc="upsert_monthly_active_user", table="monthly_active_users", keyvalues={ @@ -102,6 +96,8 @@ class MonthlyActiveUsersStore(SQLBaseStore): }, lock=False, ) + self.is_user_monthly_active.invalidate((user_id,)) + self.get_monthly_active_count.invalidate(()) @cachedInlineCallbacks(num_args=1) def is_user_monthly_active(self, user_id): @@ -120,5 +116,4 @@ class MonthlyActiveUsersStore(SQLBaseStore): retcol="user_id", desc="is_user_monthly_active", ) - defer.returnValue(bool(user_present)) diff --git a/tests/storage/test_monthly_active_users.py b/tests/storage/test_monthly_active_users.py index d8d25a6069..c32109ecc5 100644 --- a/tests/storage/test_monthly_active_users.py +++ b/tests/storage/test_monthly_active_users.py @@ -1,6 +1,19 @@ -from twisted.internet import defer +# -*- coding: utf-8 -*- +# Copyright 2018 New Vector +# +# 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. -from synapse.storage.monthly_active_users import MonthlyActiveUsersStore +from twisted.internet import defer import tests.unittest import tests.utils @@ -10,20 +23,19 @@ from tests.utils import setup_test_homeserver class MonthlyActiveUsersTestCase(tests.unittest.TestCase): def __init__(self, *args, **kwargs): super(MonthlyActiveUsersTestCase, self).__init__(*args, **kwargs) - self.mau = None @defer.inlineCallbacks def setUp(self): - hs = yield setup_test_homeserver() - self.mau = MonthlyActiveUsersStore(None, hs) + self.hs = yield setup_test_homeserver() + self.store = self.hs.get_datastore() @defer.inlineCallbacks def test_can_insert_and_count_mau(self): - count = yield self.mau.get_monthly_active_count() + count = yield self.store.get_monthly_active_count() self.assertEqual(0, count) - yield self.mau.upsert_monthly_active_user("@user:server") - count = yield self.mau.get_monthly_active_count() + yield self.store.upsert_monthly_active_user("@user:server") + count = yield self.store.get_monthly_active_count() self.assertEqual(1, count) @@ -32,11 +44,23 @@ class MonthlyActiveUsersTestCase(tests.unittest.TestCase): user_id1 = "@user1:server" user_id2 = "@user2:server" user_id3 = "@user3:server" - result = yield self.mau.is_user_monthly_active(user_id1) + result = yield self.store.is_user_monthly_active(user_id1) self.assertFalse(result) - yield self.mau.upsert_monthly_active_user(user_id1) - yield self.mau.upsert_monthly_active_user(user_id2) - result = yield self.mau.is_user_monthly_active(user_id1) + yield self.store.upsert_monthly_active_user(user_id1) + yield self.store.upsert_monthly_active_user(user_id2) + result = yield self.store.is_user_monthly_active(user_id1) self.assertTrue(result) - result = yield self.mau.is_user_monthly_active(user_id3) + result = yield self.store.is_user_monthly_active(user_id3) self.assertFalse(result) + + @defer.inlineCallbacks + def test_reap_monthly_active_users(self): + self.hs.config.max_mau_value = 5 + initial_users = 10 + for i in range(initial_users): + yield self.store.upsert_monthly_active_user("@user%d:server" % i) + count = yield self.store.get_monthly_active_count() + self.assertTrue(count, initial_users) + yield self.store.reap_monthly_active_users() + count = yield self.store.get_monthly_active_count() + self.assertTrue(count, initial_users - self.hs.config.max_mau_value)