From 7c7706f42b56dd61f5eb17679aa12247f7058ed5 Mon Sep 17 00:00:00 2001 From: Erik Johnston Date: Thu, 15 Mar 2018 15:40:13 +0000 Subject: Fix bug where state cache used lots of memory The state cache bases its size on the sum of the size of entries. The size of the entry is calculated once on insertion, so it is important that the size of entries does not change. The DictionaryCache modified the entries size, which caused the state cache to incorrectly think it was smaller than it actually was. --- synapse/util/caches/dictionary_cache.py | 6 +++++- synapse/util/caches/lrucache.py | 8 ++++---- 2 files changed, 9 insertions(+), 5 deletions(-) (limited to 'synapse/util') diff --git a/synapse/util/caches/dictionary_cache.py b/synapse/util/caches/dictionary_cache.py index d4105822b3..1709e8b429 100644 --- a/synapse/util/caches/dictionary_cache.py +++ b/synapse/util/caches/dictionary_cache.py @@ -132,9 +132,13 @@ class DictionaryCache(object): self._update_or_insert(key, value, known_absent) def _update_or_insert(self, key, value, known_absent): - entry = self.cache.setdefault(key, DictionaryEntry(False, set(), {})) + # We pop and reinsert as we need to tell the cache the size may have + # changed + + entry = self.cache.pop(key, DictionaryEntry(False, set(), {})) entry.value.update(value) entry.known_absent.update(known_absent) + self.cache[key] = entry def _insert(self, key, value, known_absent): self.cache[key] = DictionaryEntry(True, known_absent, value) diff --git a/synapse/util/caches/lrucache.py b/synapse/util/caches/lrucache.py index f088dd430e..a4bf8fa6ae 100644 --- a/synapse/util/caches/lrucache.py +++ b/synapse/util/caches/lrucache.py @@ -154,14 +154,14 @@ class LruCache(object): def cache_set(key, value, callbacks=[]): node = cache.get(key, None) if node is not None: - if value != node.value: + if node.callbacks and value != node.value: for cb in node.callbacks: cb() node.callbacks.clear() - if size_callback: - cached_cache_len[0] -= size_callback(node.value) - cached_cache_len[0] += size_callback(value) + if size_callback: + cached_cache_len[0] -= size_callback(node.value) + cached_cache_len[0] += size_callback(value) node.callbacks.update(callbacks) -- cgit 1.5.1 From 9a0d783c113ae74c55e409d33219cd77f3662b9f Mon Sep 17 00:00:00 2001 From: Erik Johnston Date: Mon, 19 Mar 2018 11:35:53 +0000 Subject: Add comments --- synapse/util/caches/lrucache.py | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'synapse/util') diff --git a/synapse/util/caches/lrucache.py b/synapse/util/caches/lrucache.py index a4bf8fa6ae..1c5a982094 100644 --- a/synapse/util/caches/lrucache.py +++ b/synapse/util/caches/lrucache.py @@ -154,11 +154,18 @@ class LruCache(object): def cache_set(key, value, callbacks=[]): node = cache.get(key, None) if node is not None: + # We sometimes store large objects, e.g. dicts, which cause + # the inequality check to take a long time. So let's only do + # the check if we have some callbacks to call. if node.callbacks and value != node.value: for cb in node.callbacks: cb() node.callbacks.clear() + # We don't bother to protect this by value != node.value as + # generally size_callback will be cheap compared with equality + # checks. (For example, taking the size of two dicts is quicker + # than comparing them for equality.) if size_callback: cached_cache_len[0] -= size_callback(node.value) cached_cache_len[0] += size_callback(value) -- cgit 1.5.1 From 8cbbfaefc1fc597cbbef52a10dbfb8ecd4d8a8cd Mon Sep 17 00:00:00 2001 From: Matthew Hodgson Date: Fri, 23 Mar 2018 10:32:50 +0000 Subject: 404 correctly on missing paths via NoResource fixes https://github.com/matrix-org/synapse/issues/2043 and https://github.com/matrix-org/synapse/issues/2029 --- synapse/app/appservice.py | 4 ++-- synapse/app/client_reader.py | 4 ++-- synapse/app/event_creator.py | 4 ++-- synapse/app/federation_reader.py | 4 ++-- synapse/app/federation_sender.py | 4 ++-- synapse/app/frontend_proxy.py | 4 ++-- synapse/app/homeserver.py | 4 ++-- synapse/app/media_repository.py | 4 ++-- synapse/app/pusher.py | 4 ++-- synapse/app/synchrotron.py | 4 ++-- synapse/app/user_dir.py | 4 ++-- synapse/util/httpresourcetree.py | 4 ++-- 12 files changed, 24 insertions(+), 24 deletions(-) (limited to 'synapse/util') diff --git a/synapse/app/appservice.py b/synapse/app/appservice.py index c6fe4516d1..f2540023a7 100644 --- a/synapse/app/appservice.py +++ b/synapse/app/appservice.py @@ -36,7 +36,7 @@ from synapse.util.logcontext import LoggingContext, preserve_fn from synapse.util.manhole import manhole from synapse.util.versionstring import get_version_string from twisted.internet import reactor -from twisted.web.resource import Resource +from twisted.web.resource import NoResource logger = logging.getLogger("synapse.app.appservice") @@ -64,7 +64,7 @@ class AppserviceServer(HomeServer): if name == "metrics": resources[METRICS_PREFIX] = MetricsResource(self) - root_resource = create_resource_tree(resources, Resource()) + root_resource = create_resource_tree(resources, NoResource()) _base.listen_tcp( bind_addresses, diff --git a/synapse/app/client_reader.py b/synapse/app/client_reader.py index 0a8ce9bc66..267d34c881 100644 --- a/synapse/app/client_reader.py +++ b/synapse/app/client_reader.py @@ -44,7 +44,7 @@ from synapse.util.logcontext import LoggingContext from synapse.util.manhole import manhole from synapse.util.versionstring import get_version_string from twisted.internet import reactor -from twisted.web.resource import Resource +from twisted.web.resource import NoResource logger = logging.getLogger("synapse.app.client_reader") @@ -88,7 +88,7 @@ class ClientReaderServer(HomeServer): "/_matrix/client/api/v1": resource, }) - root_resource = create_resource_tree(resources, Resource()) + root_resource = create_resource_tree(resources, NoResource()) _base.listen_tcp( bind_addresses, diff --git a/synapse/app/event_creator.py b/synapse/app/event_creator.py index 172e989b54..b915d12d53 100644 --- a/synapse/app/event_creator.py +++ b/synapse/app/event_creator.py @@ -52,7 +52,7 @@ from synapse.util.logcontext import LoggingContext from synapse.util.manhole import manhole from synapse.util.versionstring import get_version_string from twisted.internet import reactor -from twisted.web.resource import Resource +from twisted.web.resource import NoResource logger = logging.getLogger("synapse.app.event_creator") @@ -104,7 +104,7 @@ class EventCreatorServer(HomeServer): "/_matrix/client/api/v1": resource, }) - root_resource = create_resource_tree(resources, Resource()) + root_resource = create_resource_tree(resources, NoResource()) _base.listen_tcp( bind_addresses, diff --git a/synapse/app/federation_reader.py b/synapse/app/federation_reader.py index 20d157911b..c1dc66dd17 100644 --- a/synapse/app/federation_reader.py +++ b/synapse/app/federation_reader.py @@ -41,7 +41,7 @@ from synapse.util.logcontext import LoggingContext from synapse.util.manhole import manhole from synapse.util.versionstring import get_version_string from twisted.internet import reactor -from twisted.web.resource import Resource +from twisted.web.resource import NoResource logger = logging.getLogger("synapse.app.federation_reader") @@ -77,7 +77,7 @@ class FederationReaderServer(HomeServer): FEDERATION_PREFIX: TransportLayerServer(self), }) - root_resource = create_resource_tree(resources, Resource()) + root_resource = create_resource_tree(resources, NoResource()) _base.listen_tcp( bind_addresses, diff --git a/synapse/app/federation_sender.py b/synapse/app/federation_sender.py index f760826d27..0cc3331519 100644 --- a/synapse/app/federation_sender.py +++ b/synapse/app/federation_sender.py @@ -42,7 +42,7 @@ from synapse.util.logcontext import LoggingContext, preserve_fn from synapse.util.manhole import manhole from synapse.util.versionstring import get_version_string from twisted.internet import defer, reactor -from twisted.web.resource import Resource +from twisted.web.resource import NoResource logger = logging.getLogger("synapse.app.federation_sender") @@ -91,7 +91,7 @@ class FederationSenderServer(HomeServer): if name == "metrics": resources[METRICS_PREFIX] = MetricsResource(self) - root_resource = create_resource_tree(resources, Resource()) + root_resource = create_resource_tree(resources, NoResource()) _base.listen_tcp( bind_addresses, diff --git a/synapse/app/frontend_proxy.py b/synapse/app/frontend_proxy.py index 816c080d18..de889357c3 100644 --- a/synapse/app/frontend_proxy.py +++ b/synapse/app/frontend_proxy.py @@ -44,7 +44,7 @@ from synapse.util.logcontext import LoggingContext from synapse.util.manhole import manhole from synapse.util.versionstring import get_version_string from twisted.internet import defer, reactor -from twisted.web.resource import Resource +from twisted.web.resource import NoResource logger = logging.getLogger("synapse.app.frontend_proxy") @@ -142,7 +142,7 @@ class FrontendProxyServer(HomeServer): "/_matrix/client/api/v1": resource, }) - root_resource = create_resource_tree(resources, Resource()) + root_resource = create_resource_tree(resources, NoResource()) _base.listen_tcp( bind_addresses, diff --git a/synapse/app/homeserver.py b/synapse/app/homeserver.py index e477c7ced6..c00afbba28 100755 --- a/synapse/app/homeserver.py +++ b/synapse/app/homeserver.py @@ -56,7 +56,7 @@ from synapse.util.rlimit import change_resource_limit from synapse.util.versionstring import get_version_string from twisted.application import service from twisted.internet import defer, reactor -from twisted.web.resource import EncodingResourceWrapper, Resource +from twisted.web.resource import EncodingResourceWrapper, NoResource from twisted.web.server import GzipEncoderFactory from twisted.web.static import File @@ -126,7 +126,7 @@ class SynapseHomeServer(HomeServer): if WEB_CLIENT_PREFIX in resources: root_resource = RootRedirect(WEB_CLIENT_PREFIX) else: - root_resource = Resource() + root_resource = NoResource() root_resource = create_resource_tree(resources, root_resource) diff --git a/synapse/app/media_repository.py b/synapse/app/media_repository.py index 84c5791b3b..fc8282bbc1 100644 --- a/synapse/app/media_repository.py +++ b/synapse/app/media_repository.py @@ -43,7 +43,7 @@ from synapse.util.logcontext import LoggingContext from synapse.util.manhole import manhole from synapse.util.versionstring import get_version_string from twisted.internet import reactor -from twisted.web.resource import Resource +from twisted.web.resource import NoResource logger = logging.getLogger("synapse.app.media_repository") @@ -84,7 +84,7 @@ class MediaRepositoryServer(HomeServer): ), }) - root_resource = create_resource_tree(resources, Resource()) + root_resource = create_resource_tree(resources, NoResource()) _base.listen_tcp( bind_addresses, diff --git a/synapse/app/pusher.py b/synapse/app/pusher.py index 98a4a7c62c..d5c3a85195 100644 --- a/synapse/app/pusher.py +++ b/synapse/app/pusher.py @@ -37,7 +37,7 @@ from synapse.util.logcontext import LoggingContext, preserve_fn from synapse.util.manhole import manhole from synapse.util.versionstring import get_version_string from twisted.internet import defer, reactor -from twisted.web.resource import Resource +from twisted.web.resource import NoResource logger = logging.getLogger("synapse.app.pusher") @@ -94,7 +94,7 @@ class PusherServer(HomeServer): if name == "metrics": resources[METRICS_PREFIX] = MetricsResource(self) - root_resource = create_resource_tree(resources, Resource()) + root_resource = create_resource_tree(resources, NoResource()) _base.listen_tcp( bind_addresses, diff --git a/synapse/app/synchrotron.py b/synapse/app/synchrotron.py index abe91dcfbd..508b66613d 100644 --- a/synapse/app/synchrotron.py +++ b/synapse/app/synchrotron.py @@ -56,7 +56,7 @@ from synapse.util.manhole import manhole from synapse.util.stringutils import random_string from synapse.util.versionstring import get_version_string from twisted.internet import defer, reactor -from twisted.web.resource import Resource +from twisted.web.resource import NoResource logger = logging.getLogger("synapse.app.synchrotron") @@ -269,7 +269,7 @@ class SynchrotronServer(HomeServer): "/_matrix/client/api/v1": resource, }) - root_resource = create_resource_tree(resources, Resource()) + root_resource = create_resource_tree(resources, NoResource()) _base.listen_tcp( bind_addresses, diff --git a/synapse/app/user_dir.py b/synapse/app/user_dir.py index 494ccb702c..5f845e80d1 100644 --- a/synapse/app/user_dir.py +++ b/synapse/app/user_dir.py @@ -43,7 +43,7 @@ from synapse.util.logcontext import LoggingContext, preserve_fn from synapse.util.manhole import manhole from synapse.util.versionstring import get_version_string from twisted.internet import reactor -from twisted.web.resource import Resource +from twisted.web.resource import NoResource logger = logging.getLogger("synapse.app.user_dir") @@ -116,7 +116,7 @@ class UserDirectoryServer(HomeServer): "/_matrix/client/api/v1": resource, }) - root_resource = create_resource_tree(resources, Resource()) + root_resource = create_resource_tree(resources, NoResource()) _base.listen_tcp( bind_addresses, diff --git a/synapse/util/httpresourcetree.py b/synapse/util/httpresourcetree.py index 45be47159a..d747849553 100644 --- a/synapse/util/httpresourcetree.py +++ b/synapse/util/httpresourcetree.py @@ -12,7 +12,7 @@ # See the License for the specific language governing permissions and # limitations under the License. -from twisted.web.resource import Resource +from twisted.web.resource import NoResource import logging @@ -45,7 +45,7 @@ def create_resource_tree(desired_tree, root_resource): for path_seg in full_path.split('/')[1:-1]: if path_seg not in last_resource.listNames(): # resource doesn't exist, so make a "dummy resource" - child_resource = Resource() + child_resource = NoResource() last_resource.putChild(path_seg, child_resource) res_id = _resource_id(last_resource, path_seg) resource_mappings[res_id] = child_resource -- cgit 1.5.1