From 927b9e6cdade369f51a207d0ac8d024902f1d5e6 Mon Sep 17 00:00:00 2001
From: bert hubert <bert.hubert@netherlabs.nl>
Date: Tue, 11 Jun 2013 16:19:13 +0200
Subject: [PATCH] updated manpage with TIME_WAIT recycling advice

---
 pdns/docs/dnstcpbench.1.txt | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/pdns/docs/dnstcpbench.1.txt b/pdns/docs/dnstcpbench.1.txt
index 590b8521c7..a778d93658 100644
--- a/pdns/docs/dnstcpbench.1.txt
+++ b/pdns/docs/dnstcpbench.1.txt
@@ -21,6 +21,12 @@ example:
 	www.powerdns.com ANY
 	powerdns.com MX
 
+When benchmarking extended runs, it may be necessary to enable TIME_WAIT
+recycling, as TCP/IP port tuples may otherwise run out.  On Linux this is
+performed by running:
+
+   # echo 1 > /proc/sys/net/ipv4/tcp_tw_recycle 
+
 OPTIONS
 -------
 
-- 
2.47.3