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From iga...@apache.org
Subject svn commit: r936805 - in /httpd/httpd/trunk/docs/manual: logs.html.en logs.xml
Date Thu, 22 Apr 2010 12:07:45 GMT
Author: igalic
Date: Thu Apr 22 12:07:44 2010
New Revision: 936805

URL: http://svn.apache.org/viewvc?rev=936805&view=rev
Log:
Adding an cache hit/miss example, regarding PR#48241

Modified:
    httpd/httpd/trunk/docs/manual/logs.html.en
    httpd/httpd/trunk/docs/manual/logs.xml

Modified: httpd/httpd/trunk/docs/manual/logs.html.en
URL: http://svn.apache.org/viewvc/httpd/httpd/trunk/docs/manual/logs.html.en?rev=936805&r1=936804&r2=936805&view=diff
==============================================================================
--- httpd/httpd/trunk/docs/manual/logs.html.en (original)
+++ httpd/httpd/trunk/docs/manual/logs.html.en Thu Apr 22 12:07:44 2010
@@ -428,6 +428,21 @@
         CustomLog logs/non_english_log common env=!english
       </code></p></div>
 
+      <p>In a caching scenario one would want to know about
+      the efficiency of the cache. A very simple method to
+      find this out would be:</p>
+
+      <div class="example"><p><code>
+        SetEnv CACHE_MISS 1<br />
+        LogFormat "%h %l %u %t "%r " %&gt;s %b %{CACHE_MISS}e" common-cache
+        CustomLog logs/access_log common-cache
+      </code></p></div>
+
+      <p><code class="module"><a href="./mod/mod_cache.html">mod_cache</a></code>
will run before
+      <code class="module"><a href="./mod/mod_env.html">mod_env</a></code>
and when successfull will deliver the
+      content without it. In that case a cache hit will log
+      <code>-</code>, while a cache miss will log <code>1</code>.</p>
+
       <p>Although we have just shown that conditional logging is very
       powerful and flexible, it is not the only way to control the
       contents of the logs. Log files are more useful when they

Modified: httpd/httpd/trunk/docs/manual/logs.xml
URL: http://svn.apache.org/viewvc/httpd/httpd/trunk/docs/manual/logs.xml?rev=936805&r1=936804&r2=936805&view=diff
==============================================================================
--- httpd/httpd/trunk/docs/manual/logs.xml (original)
+++ httpd/httpd/trunk/docs/manual/logs.xml Thu Apr 22 12:07:44 2010
@@ -458,6 +458,21 @@
         CustomLog logs/non_english_log common env=!english
       </example>
 
+      <p>In a caching scenario one would want to know about
+      the efficiency of the cache. A very simple method to
+      find this out would be:</p>
+
+      <example>
+        SetEnv CACHE_MISS 1<br />
+        LogFormat "%h %l %u %t "%r " %>s %b %{CACHE_MISS}e" common-cache
+        CustomLog logs/access_log common-cache
+      </example>
+
+      <p><module>mod_cache</module> will run before
+      <module>mod_env</module> and when successfull will deliver the
+      content without it. In that case a cache hit will log
+      <code>-</code>, while a cache miss will log <code>1</code>.</p>
+
       <p>Although we have just shown that conditional logging is very
       powerful and flexible, it is not the only way to control the
       contents of the logs. Log files are more useful when they



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