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I have switched Apache from preform mpm to event mpm. Now Apache is not running out of memory but when I check htop I see that there are around 300 httpd processes. I know that they are dependent on ThreadsPerChild and ServerLimit directives but they are not set in any config values.

How can I see the current set values of all config options?
I tried apachectl -S but that is not very helpful.

devops_mode
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Settings neither explicitly defined in your main httpd.conf nor in any additional files loaded with the Include , IncludeOptional directives and not modified locally with a .htaccess file use their default values as set at compile time.

The manual documents the default values of all directives.

mod_info can show you which settings Apache httpd did load from your main httpd.conf and from any additional files loaded with the Include , IncludeOptional directives. You can enable either the mod_info URL or, dump the pre-parsed configuration to stdout during server startup with the -DDUMP_CONFIG start-up option.

HBruijn
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  • Thanks @HBruijin. I have done that but I didn't see compiled default values of directives. I know that `ServerLimit` directive has default value of 16 from the documentation but I want to know if there is an option to see the values of the running instance. For example I can check default or set values of PHP and MySQL variables. – devops_mode Aug 06 '19 at 05:05
  • also try `sudo apache2ctl -t -D DUMP_RUN_CFG`. – Abdull Jan 03 '22 at 21:35