From 0847c38196713d371f6175f23bdd6d2dd937600d Mon Sep 17 00:00:00 2001
From: Ben Halpern <bendhalpern@gmail.com>
Date: Wed, 28 Oct 2020 09:22:44 -0400
Subject: [PATCH] [deploy] Enable Puma's nakayoshi_fork feature (#11121)

* Run GC.compact before fork

* Change to nakayoshi_fork
---
 config/puma.rb | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/config/puma.rb b/config/puma.rb
index 3d0a6c3c4..4dbb059f3 100644
--- a/config/puma.rb
+++ b/config/puma.rb
@@ -26,6 +26,10 @@ pidfile ENV.fetch("PIDFILE") { "tmp/pids/server.pid" }
 #
 workers ENV.fetch("WEB_CONCURRENCY", 2)
 
+# calls GC a handful of times and compacts the heap on Ruby 2.7+ before forking.
+# This may reduce memory usage of Puma on MRI.
+nakayoshi_fork
+
 # Use the `preload_app!` method when specifying a `workers` number.
 # This directive tells Puma to first boot the application and load code
 # before forking the application. This takes advantage of Copy On Write