From 1d0074586d249b7a612e944d35fd70b169127a2d Mon Sep 17 00:00:00 2001
From: laiwei <laiwei.ustc@gmail.com>
Date: Fri, 24 Oct 2014 15:45:17 +0800
Subject: [PATCH] add PING-PONG doc

---
 doc/rrdcached.pod | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/doc/rrdcached.pod b/doc/rrdcached.pod
index 2999eb40..1c29c401 100644
--- a/doc/rrdcached.pod
+++ b/doc/rrdcached.pod
@@ -646,6 +646,13 @@ Example:
  JournalBytes: 190
  JournalRotate: 0
 
+=item B<PING>
+
+PING-PONG, this is very usefull when using connection pool between user client and RRDCACHED.
+
+Example:
+ 0 PONG
+
 =item B<UPDATE> I<filename> I<values> [I<values> ...]
 
 Adds more data to a filename. This is B<the> operation the daemon was designed
-- 
2.47.2