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我正在編寫和構建Apache的Linux框中工作。我無法告訴我使用的是哪個Apache MPM（prefork或worker），因爲在/ usr/sbin /中似乎都有可執行文件。這是一個CentOS框：Apache MPM混淆 - 需要澄清
httpd
httpd.worker
在腳本/ usr/sbin目錄/的apachectl是下面的行：
# the path to your httpd binary, including options if necessary
HTTPD='/usr/sbin/httpd'
然而，/ usr/sbin目錄/的apachectl還示出HTTPD配置在以下文件中這使我相信它的覆蓋上述選項httpd和在httpd.worker指着它：
$ cat /etc/sysconfig/httpd
# Configuration file for the httpd service.
#
# The default processing model (MPM) is the process-based
# 'prefork' model. A thread-based model, 'worker', is also
# available, but does not work with some modules (such as PHP).
# The service must be stopped before changing this variable.
#
HTTPD=/usr/sbin/httpd.worker
#
# To pass additional options (for instance, -D definitions) to the
# httpd binary at startup, set OPTIONS here.
#
#OPTIONS=
#
# By default, the httpd process is started in the C locale; to
# change the locale in which the server runs, the HTTPD_LANG
# variable can be set.
#
#HTTPD_LANG=C
#
# By default, the httpd process will create the file
# /var/run/httpd/httpd.pid in which it records its process
# identification number when it starts. If an alternate location is
# specified in httpd.conf (via the PidFile directive), the new
# location needs to be reported in the PIDFILE.
#
#PIDFILE=/var/run/httpd/httpd.pid
我的結論是，我使用MPM工人。然而，爲什麼我會在/ usr/sbin中有一個httpd可執行文件，它似乎被編譯爲MPM prefork？看看這些命令？文物也許?:
# httpd -l
compiled in modules:
core.c
prefork.c
http_core.c
mod_so.c
$ httpd -V
Server version: Apache/2.2.15 (Unix)
Server built: Feb 13 2012 22:31:42
Server's Module Magic Number: 20051115:24
Server loaded: APR 1.3.9, APR-Util 1.3.9
Compiled using: APR 1.3.9, APR-Util 1.3.9
Architecture: 64-bit
Server MPM: Prefork
threaded: no
forked: yes (variable process count)
Server compiled with....
-D APACHE_MPM_DIR="server/mpm/prefork"
-D APR_HAS_SENDFILE
-D APR_HAS_MMAP
-D APR_HAVE_IPV6 (IPv4-mapped addresses enabled)
-D APR_USE_SYSVSEM_SERIALIZE
-D APR_USE_PTHREAD_SERIALIZE
-D SINGLE_LISTEN_UNSERIALIZED_ACCEPT
-D APR_HAS_OTHER_CHILD
-D AP_HAVE_RELIABLE_PIPED_LOGS
-D DYNAMIC_MODULE_LIMIT=128
-D HTTPD_ROOT="/etc/httpd"
-D SUEXEC_BIN="/usr/sbin/suexec"
-D DEFAULT_PIDLOG="run/httpd.pid"
-D DEFAULT_SCOREBOARD="logs/apache_runtime_status"
-D DEFAULT_LOCKFILE="logs/accept.lock"
-D DEFAULT_ERRORLOG="logs/error_log"
-D AP_TYPES_CONFIG_FILE="conf/mime.types"
-D SERVER_CONFIG_FILE="conf/httpd.conf"
$ httpd.worker -l
Compiled in modules:
core.c
worker.c
http_core.c
mod_so.c
$ apachectl -l
Compiled in modules:
core.c
worker.c
http_core.c
mod_so.c
# apachectl -V
Server version: Apache/2.2.15 (Unix)
Server built: Feb 13 2012 22:33:00
Server's Module Magic Number: 20051115:24
Server loaded: APR 1.3.9, APR-Util 1.3.9
Compiled using: APR 1.3.9, APR-Util 1.3.9
Architecture: 64-bit
Server MPM: Worker
threaded: yes (fixed thread count)
forked: yes (variable process count)
Server compiled with....
-D APACHE_MPM_DIR="server/mpm/worker"
-D APR_HAS_SENDFILE
-D APR_HAS_MMAP
-D APR_HAVE_IPV6 (IPv4-mapped addresses enabled)
-D APR_USE_SYSVSEM_SERIALIZE
-D APR_USE_PTHREAD_SERIALIZE
-D SINGLE_LISTEN_UNSERIALIZED_ACCEPT
-D APR_HAS_OTHER_CHILD
-D AP_HAVE_RELIABLE_PIPED_LOGS
-D DYNAMIC_MODULE_LIMIT=128
-D HTTPD_ROOT="/etc/httpd"
-D SUEXEC_BIN="/usr/sbin/suexec"
-D DEFAULT_SCOREBOARD="logs/apache_runtime_status"
-D DEFAULT_ERRORLOG="logs/error_log"
-D AP_TYPES_CONFIG_FILE="conf/mime.types"
-D SERVER_CONFIG_FILE="conf/httpd.conf"
的最後一個原因，我相信我跑httpd.worker：
ps -C httpd.worker -F
UID PID PPID C SZ RSS PSR STIME TTY TIME CMD
root 13603 1 0 34690 4852 1 01:58 ? 00:00:00 /usr/sbin/httpd.worker
apache 13605 13603 0 34619 2352 1 01:58 ? 00:00:00 /usr/sbin/httpd.worker
apache 13606 13603 0 123554 7444 1 01:58 ? 00:00:00 /usr/sbin/httpd.worker
apache 13607 13603 0 240987 52604 0 01:58 ? 00:00:00 /usr/sbin/httpd.worker
apache 13609 13603 0 273755 52396 0 01:58 ? 00:00:00 /usr/sbin/httpd.worker
apache 13611 13603 0 290139 52128 0 01:58 ? 00:00:00 /usr/sbin/httpd.worker