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From elu...@apache.org
Subject svn commit: r1726574 - /httpd/httpd/trunk/docs/manual/mod/mod_deflate.xml
Date Mon, 25 Jan 2016 06:25:59 GMT
Author: elukey
Date: Mon Jan 25 06:25:59 2016
New Revision: 1726574

URL: http://svn.apache.org/viewvc?rev=1726574&view=rev
Log:
Added important info for the DeflateBufferSize directive (mod_deflate).
Bug: 33454


Modified:
    httpd/httpd/trunk/docs/manual/mod/mod_deflate.xml

Modified: httpd/httpd/trunk/docs/manual/mod/mod_deflate.xml
URL: http://svn.apache.org/viewvc/httpd/httpd/trunk/docs/manual/mod/mod_deflate.xml?rev=1726574&r1=1726573&r2=1726574&view=diff
==============================================================================
--- httpd/httpd/trunk/docs/manual/mod/mod_deflate.xml (original)
+++ httpd/httpd/trunk/docs/manual/mod/mod_deflate.xml Mon Jan 25 06:25:59 2016
@@ -296,7 +296,14 @@ CustomLog "logs/deflate_log" deflate
 <usage>
     <p>The <directive>DeflateBufferSize</directive> directive specifies
     the size in bytes of the fragments that zlib should compress at one
-    time.</p>
+    time. If the compressed response size is bigger than the one specified
+    by this directive then httpd will switch to chunked encoding 
+    (HTTP header <code>Transfer-Encoding</code> set to <code>Chunked</code>),
with the
+    side effect of not setting any <code>Content-Length</code> HTTP header. This
is particularly 
+    important when httpd works behind reverse caching proxies like Varnish or when httpd
is configured with 
+    <module>mod_cache</module> and <module>mod_cache_disk</module>
because
+    HTTP responses without any <code>Content-Length</code> header might not be
cached.
+  </p>
 </usage>
 </directivesynopsis>
 



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