Apache的fork模式和worker模式判断方法

#
# 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 "logs/httpd.pid"
</IfModule>

#
# The accept serialization lock file MUST BE STORED ON A LOCAL DISK.
#
<IfModule !mpm_winnt_module>
<IfModule !mpm_netware_module>
LockFile "logs/accept.lock"
</IfModule>
</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
# 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>

# BeOS MPM
# StartThreads: how many threads do we initially spawn?
# MaxClients:  max number of threads we can have (1 thread == 1 client)
# MaxRequestsPerThread: maximum number of requests each thread will process
<IfModule mpm_beos_module>
  StartThreads      10
  MaxClients       50
  MaxRequestsPerThread 10000
</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
# MaxRequestsPerChild: Maximum number of requests 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
  MaxRequestsPerChild   0
  MaxMemFree       100
</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
# MaxRequestsPerChild: Maximum number of connections per server process
<IfModule mpm_mpmt_os2_module>
  StartServers      2
  MinSpareThreads    5
  MaxSpareThreads    10
  MaxRequestsPerChild  0
</IfModule>

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