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-rw-r--r--synapse/util/caches/__init__.py2
-rw-r--r--synapse/util/caches/descriptors.py5
-rw-r--r--synapse/util/caches/stream_change_cache.py6
3 files changed, 3 insertions, 10 deletions
diff --git a/synapse/util/caches/__init__.py b/synapse/util/caches/__init__.py
index 4a83c46d98..4adae96681 100644
--- a/synapse/util/caches/__init__.py
+++ b/synapse/util/caches/__init__.py
@@ -16,7 +16,7 @@
 import synapse.metrics
 import os
 
-CACHE_SIZE_FACTOR = float(os.environ.get("SYNAPSE_CACHE_FACTOR", 0.1))
+CACHE_SIZE_FACTOR = float(os.environ.get("SYNAPSE_CACHE_FACTOR", 0.5))
 
 metrics = synapse.metrics.get_metrics_for("synapse.util.caches")
 
diff --git a/synapse/util/caches/descriptors.py b/synapse/util/caches/descriptors.py
index cbdff86596..af65bfe7b8 100644
--- a/synapse/util/caches/descriptors.py
+++ b/synapse/util/caches/descriptors.py
@@ -16,6 +16,7 @@ import logging
 
 from synapse.util.async import ObservableDeferred
 from synapse.util import unwrapFirstError, logcontext
+from synapse.util.caches import CACHE_SIZE_FACTOR
 from synapse.util.caches.lrucache import LruCache
 from synapse.util.caches.treecache import TreeCache, iterate_tree_cache_entry
 from synapse.util.stringutils import to_ascii
@@ -25,7 +26,6 @@ from . import register_cache
 from twisted.internet import defer
 from collections import namedtuple
 
-import os
 import functools
 import inspect
 import threading
@@ -37,9 +37,6 @@ logger = logging.getLogger(__name__)
 _CacheSentinel = object()
 
 
-CACHE_SIZE_FACTOR = float(os.environ.get("SYNAPSE_CACHE_FACTOR", 0.1))
-
-
 class CacheEntry(object):
     __slots__ = [
         "deferred", "sequence", "callbacks", "invalidated"
diff --git a/synapse/util/caches/stream_change_cache.py b/synapse/util/caches/stream_change_cache.py
index 609625b322..941d873ab8 100644
--- a/synapse/util/caches/stream_change_cache.py
+++ b/synapse/util/caches/stream_change_cache.py
@@ -13,20 +13,16 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from synapse.util.caches import register_cache
+from synapse.util.caches import register_cache, CACHE_SIZE_FACTOR
 
 
 from blist import sorteddict
 import logging
-import os
 
 
 logger = logging.getLogger(__name__)
 
 
-CACHE_SIZE_FACTOR = float(os.environ.get("SYNAPSE_CACHE_FACTOR", 0.1))
-
-
 class StreamChangeCache(object):
     """Keeps track of the stream positions of the latest change in a set of entities.