diff options
| -rw-r--r-- | changelog.d/11849.misc | 1 | ||||
| -rw-r--r-- | docs/sample_config.yaml | 13 | ||||
| -rw-r--r-- | docs/upgrade.md | 7 | ||||
| -rw-r--r-- | synapse/config/background_updates.py | 0 | ||||
| -rw-r--r-- | synapse/config/cache.py | 40 |
5 files changed, 50 insertions, 11 deletions
diff --git a/changelog.d/11849.misc b/changelog.d/11849.misc new file mode 100644 index 0000000000..9561eab192 --- /dev/null +++ b/changelog.d/11849.misc @@ -0,0 +1 @@ +Enable cache time-based expiry by default. The `expiry_time` config flag will be superseded by `expire_caches` and `cache_entry_ttl`. diff --git a/docs/sample_config.yaml b/docs/sample_config.yaml index 946cd281d2..d2bb3d4208 100644 --- a/docs/sample_config.yaml +++ b/docs/sample_config.yaml @@ -751,11 +751,16 @@ caches: per_cache_factors: #get_users_who_share_room_with_user: 2.0 - # Controls how long an entry can be in a cache without having been - # accessed before being evicted. Defaults to None, which means - # entries are never evicted based on time. + # Controls whether cache entries are evicted after a specified time + # period. Defaults to true. Uncomment to disable this feature. # - #expiry_time: 30m + #expire_caches: false + + # If expire_caches is enabled, this flag controls how long an entry can + # be in a cache without having been accessed before being evicted. + # Defaults to 30m. Uncomment to set a different time to live for cache entries. + # + #cache_entry_ttl: 30m # Controls how long the results of a /sync request are cached for after # a successful response is returned. A higher duration can help clients with diff --git a/docs/upgrade.md b/docs/upgrade.md index 6f20000295..25a86c08e6 100644 --- a/docs/upgrade.md +++ b/docs/upgrade.md @@ -111,6 +111,13 @@ to: Please update any relevant reverse proxy or firewall configurations appropriately. +## Time-based cache expiry is now enabled by default + +Formerly, entries in the cache were not evicted regardless of whether they were accessed after storing. +This behavior has now changed. By default entries in the cache are now evicted after 30m of not being accessed. +To change the default behavior, go to the `caches` section of the config and change the `expire_caches` and +`cache_entry_ttl` flags as necessary. Please note that these flags replace the `expiry_time` flag in the config. + ## Deprecation of `capability` `org.matrix.msc3283.*` The `capabilities` of MSC3283 from the REST API `/_matrix/client/r0/capabilities` diff --git a/synapse/config/background_updates.py b/synapse/config/background_updates.py new file mode 100644 index 0000000000..e69de29bb2 --- /dev/null +++ b/synapse/config/background_updates.py diff --git a/synapse/config/cache.py b/synapse/config/cache.py index d9d85f98e1..387ac6d115 100644 --- a/synapse/config/cache.py +++ b/synapse/config/cache.py @@ -12,6 +12,7 @@ # See the License for the specific language governing permissions and # limitations under the License. +import logging import os import re import threading @@ -23,6 +24,8 @@ from synapse.python_dependencies import DependencyException, check_requirements from ._base import Config, ConfigError +logger = logging.getLogger(__name__) + # The prefix for all cache factor-related environment variables _CACHE_PREFIX = "SYNAPSE_CACHE_FACTOR" @@ -148,11 +151,16 @@ class CacheConfig(Config): per_cache_factors: #get_users_who_share_room_with_user: 2.0 - # Controls how long an entry can be in a cache without having been - # accessed before being evicted. Defaults to None, which means - # entries are never evicted based on time. + # Controls whether cache entries are evicted after a specified time + # period. Defaults to true. Uncomment to disable this feature. + # + #expire_caches: false + + # If expire_caches is enabled, this flag controls how long an entry can + # be in a cache without having been accessed before being evicted. + # Defaults to 30m. Uncomment to set a different time to live for cache entries. # - #expiry_time: 30m + #cache_entry_ttl: 30m # Controls how long the results of a /sync request are cached for after # a successful response is returned. A higher duration can help clients with @@ -217,12 +225,30 @@ class CacheConfig(Config): e.message # noqa: B306, DependencyException.message is a property ) - expiry_time = cache_config.get("expiry_time") - if expiry_time: - self.expiry_time_msec: Optional[int] = self.parse_duration(expiry_time) + expire_caches = cache_config.get("expire_caches", True) + cache_entry_ttl = cache_config.get("cache_entry_ttl", "30m") + + if expire_caches: + self.expiry_time_msec: Optional[int] = self.parse_duration(cache_entry_ttl) else: self.expiry_time_msec = None + # Backwards compatibility support for the now-removed "expiry_time" config flag. + expiry_time = cache_config.get("expiry_time") + + if expiry_time and expire_caches: + logger.warning( + "You have set two incompatible options, expiry_time and expire_caches. Please only use the " + "expire_caches and cache_entry_ttl options and delete the expiry_time option as it is " + "deprecated." + ) + if expiry_time: + logger.warning( + "Expiry_time is a deprecated option, please use the expire_caches and cache_entry_ttl options " + "instead." + ) + self.expiry_time_msec = self.parse_duration(expiry_time) + self.sync_response_cache_duration = self.parse_duration( cache_config.get("sync_response_cache_duration", 0) ) |