diff --git a/changelog.d/3664.feature b/changelog.d/3664.feature
new file mode 100644
index 0000000000000000000000000000000000000000..184dde99393de9d4c1ff1f5d981a96d2f9a12ee5
--- /dev/null
+++ b/changelog.d/3664.feature
@@ -0,0 +1 @@
+Add some metrics for the appservice and federation event sending loops