<highlight language="config">
LogLevel info rewrite:trace5
</highlight>
+</example>
<p>This sets the main <directive>LogLevel</directive> to info, but
turns it up to <code>trace5</code> for
LogFormat "%h %l %u %t \"%r\" %>s %b" common
CustomLog "logs/access_log" common
</highlight>
+</example>
<p>This defines the <em>nickname</em> <code>common</code> and
associates it with a particular log format string. The format
LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-agent}i\"" combined
CustomLog "log/access_log" combined
</highlight>
+</example>
<p>This format is exactly the same as the Common Log Format,
with the addition of two more fields. Each of the additional
CustomLog "logs/referer_log" "%{Referer}i -> %U"
CustomLog "logs/agent_log" "%{User-agent}i"
</highlight>
+</example>
<p>This example also shows that it is not necessary to define a
nickname with the <directive
# Log what remains
CustomLog "logs/access_log" common env=!dontlog
</highlight>
+</example>
<p>As another example, consider logging requests from
english-speakers to one log file, and non-english speakers to a
CustomLog "logs/english_log" common env=english
CustomLog "logs/non_english_log" common env=!english
</highlight>
+</example>
<p>In a caching scenario one would want to know about
the efficiency of the cache. A very simple method to
LogFormat "%h %l %u %t "%r " %>s %b %{CACHE_MISS}e" common-cache
CustomLog "logs/access_log" common-cache
</highlight>
+</example>
<p><module>mod_cache</module> will run before
<module>mod_env</module> and, when successful, will deliver the
LogFormat "%400,501{User-agent}i" browserlog
LogFormat "%!200,304,302{Referer}i" refererlog
</highlight>
+</example>
<p>In the first example, the <code>User-agent</code> will be
logged if the HTTP status code is 400 or 501. In other cases, a
LogFormat "%v %p %h %l %u %t \"%r\" %>s %b" commonvhost
CustomLog "logs/access_log" commonvhost
</highlight>
+</example>
<p>The <code>%v</code> is used to log the name of the virtual
host that is serving the request. Then a program like <a