From b084e4d963f2df377dfe98b6d9645fa9183a368b Mon Sep 17 00:00:00 2001
From: David Baker <dave@matrix.org>
Date: Fri, 29 Apr 2016 20:14:55 +0100
Subject: [PATCH] Add constant for throttle multiplier

---
 synapse/push/emailpusher.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/synapse/push/emailpusher.py b/synapse/push/emailpusher.py
index c10deded06..3a13c7485a 100644
--- a/synapse/push/emailpusher.py
+++ b/synapse/push/emailpusher.py
@@ -30,6 +30,7 @@ DELAY_BEFORE_MAIL_MS = 2 * 60 * 1000
 
 THROTTLE_START_MS = 2 * 60 * 1000
 THROTTLE_MAX_MS = (2 * 60 * 1000) * (2 ** 11)  # ~3 days
+THROTTLE_MULTIPLIER = 2
 
 # If no event triggers a notification for this long after the previous,
 # the throttle is released.
@@ -231,7 +232,7 @@ class EmailPusher(object):
                 new_throttle_ms = THROTTLE_START_MS
             else:
                 new_throttle_ms = min(
-                    current_throttle_ms * 2,
+                    current_throttle_ms * THROTTLE_MULTIPLIER,
                     THROTTLE_MAX_MS
                 )
         self.throttle_params[room_id] = {