This is what is in the extra/httpd-mpm.conf:

# prefork MPM
# StartServers: number of server processes to start
# MinSpareServers: minimum number of server processes which are kept spare
# MaxSpareServers: maximum number of server processes which are kept spare
# MaxClients: maximum number of server processes allowed to start
# MaxRequestsPerChild: maximum number of requests a server process serves
<IfModule mpm_prefork_module>
    StartServers          5
    MinSpareServers       5
    MaxSpareServers      10
    MaxClients          150
    MaxRequestsPerChild   0
</IfModule>





From: Yann Ylavic <ylavic.dev@gmail.com>
To: users@httpd.apache.org; o haya <ohaya@yahoo.com>
Sent: Monday, November 16, 2015 7:57 PM
Subject: Re: [users@httpd] Getting "connection refused" Apache 2.4

On Tue, Nov 17, 2015 at 1:11 AM, Yann Ylavic <ylavic.dev@gmail.com> wrote:



> On Tue, Nov 17, 2015 at 12:23 AM, o haya <ohaya@yahoo.com.invalid> wrote:
>>
>> This is with the as-built Apache configuration settings (i.e., I haven't
>> tried tweaking them).
>
> Please share your settings for [...]
> MaxSpareThreads, MinSpareThreads [...]


I meant MaxSpareServers and MinSpareServers here, *Threads are not
relevant for prefork.