diff --git a/lib/tasks/cache.rake b/lib/tasks/cache.rake
index 9e2fb429d577f37fc78365f9a98b3ae42ba8c103..f221afcf73a21b5bb1c802653bd29afa5cf7625a 100644
--- a/lib/tasks/cache.rake
+++ b/lib/tasks/cache.rake
@@ -1,5 +1,5 @@
 namespace :cache do
-  CLEAR_BATCH_SIZE = 1000 # The more the faster, but having too many can crash Ruby
+  CLEAR_BATCH_SIZE = 1000 # There seems to be no speedup when pushing beyond 1,000
   REDIS_SCAN_START_STOP = '0' # Magic value, see http://redis.io/commands/scan
 
   desc "GitLab | Clear redis cache"