From 48709a9b2201f296ccac246050ad5f5be25a4f43 Mon Sep 17 00:00:00 2001
From: Andrew Morgan <andrew@amorgan.xyz>
Date: Thu, 30 Apr 2020 16:00:42 +0100
Subject: [PATCH] Pull global cache prefix from environment by default

---
 synapse/config/cache.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/synapse/config/cache.py b/synapse/config/cache.py
index 583fcaaf65..2610ae9c25 100644
--- a/synapse/config/cache.py
+++ b/synapse/config/cache.py
@@ -28,7 +28,9 @@ _DEFAULT_EVENT_CACHE_SIZE = "10K"
 class CacheProperties(object):
     def __init__(self):
         # The default factor size for all caches
-        self.default_factor_size = _DEFAULT_FACTOR_SIZE
+        self.default_factor_size = float(
+            os.environ.get(_CACHE_PREFIX, _DEFAULT_FACTOR_SIZE)
+        )
         self.resize_all_caches_func = None