From b1e498d6e1ad674856816bf318fb290646c06556 Mon Sep 17 00:00:00 2001
From: Erik Johnston <erik@matrix.org>
Date: Fri, 22 Nov 2019 18:39:26 +0000
Subject: [PATCH] Handle prefill

---
 synapse/util/caches/descriptors.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/synapse/util/caches/descriptors.py b/synapse/util/caches/descriptors.py
index 3a20efc566..78ebc485dc 100644
--- a/synapse/util/caches/descriptors.py
+++ b/synapse/util/caches/descriptors.py
@@ -244,6 +244,9 @@ class Cache(object):
 
     def prefill(self, key, value, callback=None):
         callbacks = [callback] if callback else []
+
+        self.ratio_tracking.add(str(hash(key)))
+
         self.cache.set(key, value, callbacks=callbacks)
 
     def invalidate(self, key):