From b24d546bd0da1778e0f782a9832d537da482b375 Mon Sep 17 00:00:00 2001
From: Yicheng Qin <qycqycqycqycqyc@gmail.com>
Date: Sun, 7 Dec 2014 15:06:22 -0800
Subject: [PATCH] rafthttp: increase sender buffer size

The buffer size is set big enough to buffer all messages generated in
one second as a follower in good path.
---
 rafthttp/sender.go | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/rafthttp/sender.go b/rafthttp/sender.go
index 5a4d0b30b..f138fc2f4 100644
--- a/rafthttp/sender.go
+++ b/rafthttp/sender.go
@@ -32,7 +32,11 @@ import (
 
 const (
 	connPerSender = 4
-	senderBufSize = connPerSender * 4
+	// senderBufSize is the size of sender buffer, which helps hold the
+	// temporary network latency.
+	// The size ensures that sender does not drop messages when the network
+	// is out of work for less than 1 second in good path.
+	senderBufSize = 64
 
 	appRespBatchMs = 50