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<div id="preamble"><h1>Apache Module mod_lbmethod_bybusyness</h1>
<div class="toplang">
<p>This module does not provide any configuration directives of its own.
It requires the services of <code class="module"><a href="../mod/mod_proxy_balancer.html">mod_proxy_balancer</a></code>, and
-provides the <code>bybusyness</code> load balancing method..</p>
+provides the <code>bybusyness</code> load balancing method.</p>
</div>
-<div id="quickview"><h3 class="directives">Directives</h3>
-<p>This module provides no
- directives.</p>
-<h3>Topics</h3>
+<div id="quickview"><h3>Topics</h3>
<ul id="topics">
<li><img alt="" src="../images/down.gif" /> <a href="#busyness">Pending Request Counting Algorithm</a></li>
-</ul><h3>See also</h3>
+</ul><h3 class="directives">Directives</h3>
+<p>This module provides no
+ directives.</p>
+<h3>Bugfix checklist</h3><ul class="seealso"><li><a href="https://www.apache.org/dist/httpd/CHANGES_2.4">httpd changelog</a></li><li><a href="https://bz.apache.org/bugzilla/buglist.cgi?bug_status=__open__&list_id=144532&product=Apache%20httpd-2&query_format=specific&order=changeddate%20DESC%2Cpriority%2Cbug_severity&component=mod_lbmethod_bybusyness">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&component=mod_lbmethod_bybusyness">Report a bug</a></li></ul><h3>See also</h3>
<ul class="seealso">
<li><code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code></li>
<li><code class="module"><a href="../mod/mod_proxy_balancer.html">mod_proxy_balancer</a></code></li>
-</ul></div>
+<li><a href="#comments_section">Comments</a></li></ul></div>
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<div class="section">
<h2><a name="busyness" id="busyness">Pending Request Counting Algorithm</a></h2>
<p>Enabled via <code>lbmethod=bybusyness</code>, this scheduler keeps
- track of how many requests each worker is assigned at present. A new
+ track of how many requests each worker is currently assigned at present. A new
request is automatically assigned to the worker with the lowest
number of active requests. This is useful in the case of workers
that queue incoming requests independently of Apache, to ensure that
queue length stays even and a request is always given to the worker
- most likely to service it fastest.</p>
+ most likely to service it the fastest and reduce latency.</p>
<p>In the case of multiple least-busy workers, the statistics (and
weightings) used by the Request Counting method are used to break the
tie. Over time, the distribution of work will come to resemble that
- characteristic of <code>byrequests</code>.</p>
+ characteristic of <code>byrequests</code> (as implemented
+ by <code class="module"><a href="../mod/mod_lbmethod_byrequests.html">mod_lbmethod_byrequests</a></code>).</p>
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