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I used apache2 -l in order to determine which Apache MPM is compiled. The output is:

 Compiled in modules:
  core.c
  mod_so.c
  mod_watchdog.c
  http_core.c
  mod_log_config.c
  mod_logio.c
  mod_version.c
  mod_unixd.c

Then, I run apache2ctl -M wich shows mpm_event_module (shared) and a2query -M which outputs event.

The question, is the apache running on Event MPM although there is no Event MPM in 'Compiled in modules'?

Rustam Paskaev
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  • lots of unneeded compiled-in modules there. I wonder why you have so many, generally core, mod_so and http_core should just be compiled in. – Daniel Ferradal Apr 19 '17 at 17:26

1 Answers1

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Yes, from apache 2.4 onwards, mpm's can be compiled as modules, unlike previous apache versions where you were forced to choose mpm during compilation and had to recompile apache to eventually switch mpm.

Note that you can't have the same module built both statically, inside sbin/httpd with can be seen from apache2 -l and dynamically as a .so file inside the modules directory which you can see with apache2 -M.

Fredi
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  • Thank you for your answer. Do you know, why Event MPM is not listed in the 'Compiled in modules'? – Rustam Paskaev Apr 19 '17 at 11:16
  • Because it's built as a module. You can choose to compile some module statically so it'll be inside the httpd binnary, or as a dynamically loaded module, like the onles inside $APACHE_ROOT/modules/ directory. Obviously you can't have the same module built both statically and dinamically. Ok, I'll update my answer with this info. – Fredi Apr 19 '17 at 11:23