httpd mpm process settings from httpd.conf are not applied

Issue

• We set thread settings for httpd in httpd.conf, but these options seem to be ignored. It seems httpd defaults are applied instead (a ServerLimit of 256 for prefork)
• We've configured our httpd server to use the worker module, but it appears to ignore these settings as a lower amount of processes are present at start up. It appears to be using some defaults instead

<IfModule mpm_worker_module>
    ThreadLimit          1000
    ServerLimit             8
    StartServers            8
    MaxClients           8000
    MinSpareThreads       100
    MaxSpareThreads      8000
    ThreadsPerChild      1000
    MaxRequestsPerChild   10000
</IfModule>

LoadModule mpm_worker_module modules/mod_mpm_worker.so