From 51f5b854ab77865c886fb5676cea187b83931996 Mon Sep 17 00:00:00 2001
From: Guanran Wang <guanran928@outlook.com>
Date: Thu, 7 Nov 2024 14:59:13 +0800
Subject: [PATCH] nixos/core: increase udp buffer sizes

---
 nixos/profiles/core/networking.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/nixos/profiles/core/networking.nix b/nixos/profiles/core/networking.nix
index 3e4f4e7..ebcafa3 100644
--- a/nixos/profiles/core/networking.nix
+++ b/nixos/profiles/core/networking.nix
@@ -12,5 +12,9 @@
   boot.kernel.sysctl = {
     "net.core.default_qdisc" = "cake";
     "net.ipv4.tcp_congestion_control" = "bbr";
+
+    # https://github.com/quic-go/quic-go/wiki/UDP-Buffer-Sizes
+    "net.core.rmem_max" = 7500000;
+    "net.core.wmem_max" = 7500000;
   };
 }