<li><A HREF="#keepalivetimeout">KeepAliveTimeout</A>
<li><A HREF="#limit"><Limit></A>
<li><A HREF="#listen">Listen</A>
+<li><A HREF="#listenbacklog">ListenBacklog</A>
<li><A HREF="#location"><Location></A>
+<li><A HREF="#lockfile">LockFile</A>
<li><A HREF="#maxclients">MaxClients</A>
<li><A HREF="#maxkeepaliverequests">MaxKeepAliveRequests</a>
<li><A HREF="#maxrequestsperchild">MaxRequestsPerChild</A>
<a href="../misc/known_bugs.html#listenbug">Known Bugs</a></p>
<hr>
+<A NAME="listenbacklog"><H2>ListenBacklog</H2></A>
+<strong>Syntax:</strong> ListenBacklog <em>backlog</em><br>
+<strong>Default:</strong> <code>ListenBacklog 511</code><br>
+<strong>Context:</strong> server config<br>
+<strong>Status:</strong> Core<br>
+<strong>Compatibility:</strong> ListenBacklog is only available in Apache
+versions after 1.2.0.<p>
+
+The maximum length of the queue of pending connections. Generally no
+tuning is needed or desired, however on some systems it is desirable
+to increase this when under a TCP SYN flood attack. See
+the backlog parameter to the <code>listen(2)</code> system call.
+
<A name="limit"><h2><Limit> directive</h2></A>
<!--%plaintext <?INDEX {\tt Limit} section directive> -->
<strong>Syntax:</strong>
<Location ~ "/(extra|special)/data">
</pre>
-would match URLs that contained the substring "/extra/data" or
+<p>would match URLs that contained the substring "/extra/data" or
"/special/data".</p>
<p>The <code>Location</code> functionality is especially useful when
</pre>
<hr>
-<A name="maxclients"><h2>MaxClients directive</h2></A>
+<A NAME="lockfile"><H2>LockFile</H2></A>
+<strong>Syntax:</strong> LockFile <em>filename</em><BR>
+<strong>Default:</strong> <code>LockFile logs/accept.lock</code><BR>
+<strong>Context:</strong> server config<BR>
+<strong>Status:</strong> core<P>
+
+The LockFile directive sets the path to the lockfile used when
+Apache is compiled with either USE_FCNTL_SERIALIZED_ACCEPT or
+USE_FLOCK_SERIALIZED_ACCEPT. This directive should normally be
+left at its default value. The main reason for changing it is if
+the <code>logs</code> directory is NFS mounted, since the lockfile
+should be stored on a local disk if possible. The PID of the main
+server process is automatically appended to the filename.
+
+<P><HR>
+
+<A name="maxclients"><h2>MaxClients</h2></A>
<!--%plaintext <?INDEX {\tt MaxClients} directive> -->
<strong>Syntax:</strong> MaxClients <em>number</em><br>
<strong>Default:</strong> <code>MaxClients 256</code><br>
See also <A HREF="#accessconfig">AccessConfig</A>.<p><hr>
-<A name="rlimit">
+<A name="rlimit"> </A>
<A name="rlimitcpu"><h2>RLimitCPU directive</h2></A>
<!--%plaintext <?INDEX {\tt RLimitCPU} directive> -->
<strong>Syntax:</strong> RLimitCPU <em># or 'max'</em> <em>[# or 'max']</em><br>
<li><A HREF="mod_negotiation.html#languagepriority">LanguagePriority</A>
<li><A HREF="core.html#limit"><Limit></A>
<li><A HREF="core.html#listen">Listen</A>
+<li><A HREF="core.html#listenbacklog">ListenBacklog</A>
<li><A HREF="mod_dld.html#loadfile">LoadFile</A>
<li><A HREF="mod_dld.html#loadmodule">LoadModule</A>
<li><A HREF="core.html#location"><Location></A>
+<li><A HREF="core.html#lockfile">LockFile</A>
<li><A HREF="mod_log_config.html#logformat">LogFormat</A>
<li><A HREF="core.html#maxclients">MaxClients</A>
<li><A HREF="core.html#maxkeepaliverequests">MaxKeepAliveRequests</A>