<p>A <var>ratio</var> between the number of (online) CPU cores and the
number of listeners' buckets can be used to make Apache HTTP Server create
<code>num_cpu_cores / ratio</code> listening buckets, each containing its
- own <directive>Listen</directive>-ing socket(s) on the same port(s), and
+ own <directive module="mpm_common">Listen</directive>-ing socket(s) on the same port(s), and
then make each child handle a single bucket (with round-robin distribution
of the buckets at children creation time).</p>
<p>The default value for <directive>ThreadsPerChild</directive> is
<code>64</code> when used with <module>mpm_winnt</module> and
<code>25</code> when used with the others.</p>
+
+ <p>The value of <directive>ThreadsPerChild</directive> can not exceed the
+ value of <directive module="mpm_common">ThreadsLimit</directive>. If a
+ higher value is configured, it will be automatically reduced at start-up
+ and a warning will be logged. The relationship between these 2 directives
+ is explained in <directive module="mpm_common">ThreadsLimit</directive>.</p>
</usage>
</directivesynopsis>