Apache HTTP Server /etc/apache2/conf.d/mpm.conf

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Alpine Linux v3.21
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File Info

Size
120 lines
MD5
104ae67710a5d173532cfe6f70550804
SHA256
c4271bbf39c2d843b8d540c1175b91e17755a870579f0fd53a10ef635624abaf

Quick Commands

curl:
curl https://exampleconfig.com/api/v1/config/original/104ae67710a5d173532cfe6f70550804?hint=mpm.conf
wget:
wget -O mpm.conf https://exampleconfig.com/api/v1/config/original/104ae67710a5d173532cfe6f70550804?hint=mpm.conf
/etc/apache2/conf.d/mpm.conf
#
# Server-Pool Management (MPM specific)
# 

#
# PidFile: The file in which the server should record its process
# identification number when it starts.
#
# Note that this is the default PidFile for most MPMs.
#
<IfModule !mpm_netware_module>
    PidFile "/run/apache2/httpd.pid"
</IfModule>

#
# Only one of the below sections will be relevant on your
# installed httpd.  Use "apachectl -l" to find out the
# active mpm.
#

# 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
# MaxRequestWorkers: maximum number of server processes allowed to start
# MaxConnectionsPerChild: maximum number of connections a server process serves
#                         before terminating
<IfModule mpm_prefork_module>
    StartServers             5
    MinSpareServers          5
    MaxSpareServers         10
    MaxRequestWorkers      250
    MaxConnectionsPerChild   0
</IfModule>

# worker MPM
# StartServers: initial number of server processes to start
# MinSpareThreads: minimum number of worker threads which are kept spare
# MaxSpareThreads: maximum number of worker threads which are kept spare
# ThreadsPerChild: constant number of worker threads in each server process
# MaxRequestWorkers: maximum number of worker threads
# MaxConnectionsPerChild: maximum number of connections a server process serves
#                         before terminating
<IfModule mpm_worker_module>
    StartServers             3
    MinSpareThreads         75
    MaxSpareThreads        250 
    ThreadsPerChild         25
    MaxRequestWorkers      400
    MaxConnectionsPerChild   0
</IfModule>

# event MPM
# StartServers: initial number of server processes to start
# MinSpareThreads: minimum number of worker threads which are kept spare
# MaxSpareThreads: maximum number of worker threads which are kept spare
# ThreadsPerChild: constant number of worker threads in each server process
# MaxRequestWorkers: maximum number of worker threads
# MaxConnectionsPerChild: maximum number of connections a server process serves
#                         before terminating
<IfModule mpm_event_module>
    StartServers             3
    MinSpareThreads         75
    MaxSpareThreads        250
    ThreadsPerChild         25
    MaxRequestWorkers      400
    MaxConnectionsPerChild   0
</IfModule>

# NetWare MPM
# ThreadStackSize: Stack size allocated for each worker thread
# StartThreads: Number of worker threads launched at server startup
# MinSpareThreads: Minimum number of idle threads, to handle request spikes
# MaxSpareThreads: Maximum number of idle threads
# MaxThreads: Maximum number of worker threads alive at the same time
# MaxConnectionsPerChild: Maximum  number of connections a thread serves. It
#                         is recommended that the default value of 0 be set
#                         for this directive on NetWare.  This will allow the
#                         thread to continue to service requests indefinitely.
<IfModule mpm_netware_module>
    ThreadStackSize      65536
    StartThreads           250
    MinSpareThreads         25
    MaxSpareThreads        250
    MaxThreads            1000
    MaxConnectionsPerChild   0
</IfModule>

# OS/2 MPM
# StartServers: Number of server processes to maintain
# MinSpareThreads: Minimum number of idle threads per process, 
#                  to handle request spikes
# MaxSpareThreads: Maximum number of idle threads per process
# MaxConnectionsPerChild: Maximum number of connections per server process
<IfModule mpm_mpmt_os2_module>
    StartServers             2
    MinSpareThreads          5
    MaxSpareThreads         10
    MaxConnectionsPerChild   0
</IfModule>

# WinNT MPM
# ThreadsPerChild: constant number of worker threads in the server process
# MaxConnectionsPerChild: maximum number of connections a server process serves
<IfModule mpm_winnt_module>
    ThreadsPerChild        150
    MaxConnectionsPerChild   0
</IfModule>

# The maximum number of free Kbytes that every allocator is allowed
# to hold without calling free(). In threaded MPMs, every thread has its own
# allocator. When not set, or when set to zero, the threshold will be set to
# unlimited.
<IfModule !mpm_netware_module>
    MaxMemFree            2048
</IfModule>
<IfModule mpm_netware_module>
    MaxMemFree             100
</IfModule>

How to Install Apache HTTP Server

Alpine Linux

sudo apk add apache2

Debian

sudo apt update && sudo apt install apache2

Red Hat Enterprise Linux

sudo yum install httpd

Ubuntu

sudo apt update && sudo apt install apache2

Configuration File Location

File Path
/etc/apache2/conf.d/mpm.conf
Directory
/etc/apache2/conf.d/
Significance
System-wide configuration directory
Description
Files in /etc/ contain system-wide configuration settings that affect all users.

Complete Apache HTTP Server Configuration Guide

What is mpm.conf?
Download the original 'mpm.conf' configuration file for Apache HTTP Server from a clean Alpine Linux v3.21 installation. This is the factory-default configuration that comes with the official Apache package, ideal for troubleshooting, restoring, or learning standard setup patterns.
Technical Details
Found at '/etc/apache2/conf.d/mpm.conf', this 120-line configuration defines virtual hosts, security modules, SSL certificates, rewrite rules, and performance directives. Powers over 30% of all websites globally and handles everything from static sites to enterprise applications.
Common Configuration Question
How do you configure Apache HTTP Server for security, performance, and virtual hosting on Alpine Linux 3.21?
Why Use This Configuration?
This default configuration includes mod_rewrite, mod_ssl, security headers, and optimized MPM settings. Essential for web hosting, development environments, and production deployments. Perfect starting point for system administrators and web developers.

Frequently Asked Questions

When should I use this mpm.conf file?

Use this original configuration file when you need to restore Apache HTTP Server to its default state after misconfiguration, during fresh installations, or as a baseline for customization. It's particularly useful for troubleshooting when your current config isn't working properly.

How do I restore Apache HTTP Server to default settings?

Download this file and replace your current configuration at /etc/apache2/conf.d/mpm.conf. Make sure to backup your existing configuration first, then restart the Apache HTTP Server service to apply the changes.

Is this mpm.conf file secure for production use?

This is the factory-default configuration that ships with Apache HTTP Server on Alpine Linux v3.21. While it provides a secure baseline, you should review and customize security settings based on your specific production requirements and compliance needs.

What's the difference between this and other OS versions?

This configuration is specifically from Alpine Linux v3.21. Different operating systems and versions may have slightly different default settings, security patches, or feature availability. Check the compatibility section above for other OS versions.

Can I use this configuration file for Apache HTTP Server troubleshooting?

Yes, this original configuration is excellent for troubleshooting. Compare it with your current settings to identify modifications that might be causing issues, or temporarily replace your config with this one to isolate problems.