From: Tony Finch <fanf@apache.org>
Date: Wed, 12 Jan 2000 01:18:07 +0000 (+0000)
Subject: Be more explicit about the performance of UseCanonicalName DNS
X-Git-Tag: 1.3.10~16
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=5288c0fb1685832d874bc24ba45a4cb261e71d58;p=apache

Be more explicit about the performance of UseCanonicalName DNS
after the scoreboard change.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@84440 13f79535-47bb-0310-9956-ffa450edef68
---

diff --git a/docs/manual/mod/core.html b/docs/manual/mod/core.html
index f28e29dbcc..4a55de51c0 100644
--- a/docs/manual/mod/core.html
+++ b/docs/manual/mod/core.html
@@ -3144,6 +3144,9 @@ is intended for use with mass IP-based virtual hosting to support
 ancient clients that do not provide a <CODE>Host:</CODE> header. With
 this option Apache does a reverse DNS lookup on the server IP address
 that the client connected to in order to work out self-referential URLs.
+This can have adverse performance implications, especially if you use
+<CODE>%V</CODE> in a <A HREF="mod_log_config.html#customlog">CustomLog</A> 
+directive or have <A HREF="mod_status.html">ExtendedStatus</A> on.
 
 <P><STRONG>Warning:</STRONG> if CGIs make assumptions about the values of
 <CODE>SERVER_NAME</CODE> they may be broken by this option.  The client