Document new ping parameter.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@425999 13f79535-47bb-0310-9956-ffa450edef68

diff --git a/docs/manual/mod/mod_proxy.xml b/docs/manual/mod/mod_proxy.xml
index 55cde331fb1fb78bfd6d4bc76e38c23f0f9535c2..cc7eca1a5e3c8c37d57df7088568930fdec471c7 100644 (file)
--- a/docs/manual/mod/mod_proxy.xml
+++ b/docs/manual/mod/mod_proxy.xml
@@ -636,6 +636,20 @@ expressions</description>
         <td>The time to wait for additional input, in milliseconds, before
         flushing the output brigade if 'flushpackets' is 'auto'.
     </td></tr>
+    <tr><td>ping</td>
+        <td>0</td>
+        <td>Ping property told webserver to send a <code>CPING</code>
+        request on ajp13 connection before forwarding to it a request.
+        The parameter is the delay in seconds to wait for the
+        <code>CPONG</code> reply.
+        This features has been added to avoid problem with hung and
+        busy Tomcat's and require ajp13 ping/pong support which has
+        been implemented on Tomcat 3.3.2+, 4.1.28+ and 5.0.13+.
+        It will inrease the network traffic during the normal operation
+        which could be an issue for you, but it will lower down the
+        traffic in case some of the cluster nodes are down or buys.
+        Currently this is in effect only for AJP.
+    </td></tr>
 
     </table>