From a1ae8aaff1a3e357072baf7115d1eadbc9c148a5 Mon Sep 17 00:00:00 2001
From: Andrew Steinborn <git@steinborn.me>
Date: Sat, 24 Apr 2021 17:52:33 +0100
Subject: [PATCH] Set Netty pooled buffer size to 4MB


diff --git a/proxy/src/main/java/net/md_5/bungee/BungeeCordLauncher.java b/proxy/src/main/java/net/md_5/bungee/BungeeCordLauncher.java
index 0db3d76a..35680528 100644
--- a/proxy/src/main/java/net/md_5/bungee/BungeeCordLauncher.java
+++ b/proxy/src/main/java/net/md_5/bungee/BungeeCordLauncher.java
@@ -26,6 +26,19 @@ public class BungeeCordLauncher
             System.setProperty( "jdk.util.jar.enableMultiRelease", "force" );
         }
 
+        // Waterfall start
+        // By default, Netty allocates 16MiB arenas for the PooledByteBufAllocator. This is too much
+        // memory for Minecraft, which imposes a maximum packet size of 2MiB! We'll use 4MiB as a more
+        // sane default.
+        //
+        // Note: io.netty.allocator.pageSize << io.netty.allocator.maxOrder is the formula used to
+        // compute the chunk size. We lower maxOrder from its default of 11 to 9. (We also use a null
+        // check, so that the user is free to choose another setting if need be.)
+        if (System.getProperty("io.netty.allocator.maxOrder") == null) {
+            System.setProperty("io.netty.allocator.maxOrder", "9");
+        }
+        // Waterfall end
+
         OptionParser parser = new OptionParser();
         parser.allowsUnrecognizedOptions();
         parser.acceptsAll( Arrays.asList( "help" ), "Show the help" );
-- 
2.31.1