Apache prefork vs. worker

apache-prefork-vs-worker.txt

##
## Server-Pool Size Regulation (MPM specific)
##

# prefork MPM

# implements a non-threaded, pre-forking web server (isolating each request)
# physical RAM hungry, maxclients is important
# 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

Angepasst
<IfModule mpm_prefork_module>
StartServers       5
MinSpareServers    5
MaxSpareServers   10
MaxClients        150
    MaxRequestsPerChild   0
</IfModule>

Original
<IfModule mpm_prefork_module>
StartServers       1
MinSpareServers    1
MaxSpareServers    5
MaxClients        25
    MaxRequestsPerChild   0
</IfModule>

# worker MPM

# using threads to serve requests
# serve a large number of requests with less system resources than a process-based server
# MaxClients and ThreadsPerChild is important
# StartServers: initial number of server processes to start
# MaxClients: maximum number of simultaneous client connections
# 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
# MaxRequestsPerChild: maximum number of requests a server process serves

Angepasst
<IfModule mpm_worker_module>
StartServers       2
MaxClients        150
MinSpareThreads    25
MaxSpareThreads    50
    ThreadsPerChild      25
    MaxRequestsPerChild   0
</IfModule>

Original
<IfModule mpm_worker_module>
StartServers       1
MaxClients        25
MinSpareThreads    1
MaxSpareThreads    4
    ThreadsPerChild      25
    MaxRequestsPerChild   0
</IfModule>