===== Apache =====
<code>
# 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
# MaxClients: maximum number of server processes allowed to start
# MaxRequestsPerChild: maximum number of requests a server process serves
<IfModule mpm_prefork_module>
    StartServers          5
    MinSpareServers       5
    MaxSpareServers      10
    MaxClients          150
    MaxRequestsPerChild   0
</IfModule>

# worker MPM
# 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
<IfModule mpm_worker_module>
    StartServers          2
    MaxClients          150
    MinSpareThreads	 25
    MaxSpareThreads	 75
    ThreadsPerChild	 25
    MaxRequestsPerChild   0
</IfModule>

</code>
===== Passenger =====
<code>
##  Passenger performance settings###
#PassengerMaxPoolSize 12
PassengerStatThrottleRate 10
PassengerPreStart http://learnexa.com/
PassengerPoolIdleTime 0
RailsFrameworkSpawnerIdleTime 0
RailsAppSpawnerIdleTime 0
### End Passenger tuning##
RailsAutoDetect off
#PassengerDebugLogFile /opt/apache2/logs/passenger.log
#PassengerLogLevel 1
TraceEnable off
AddOutputFilter DEFLATE xml css js htm html php
AddOutputFilterByType DEFLATE text/html
DeflateCompressionLevel 9
</code>