# Select the MPM module which should be used by uncommenting exactly
# one of the following LoadModule lines:
# prefork MPM: Implements a non-threaded, pre-forking web server
# See: http://httpd.apache.org/docs/2.4/mod/prefork.html
#LoadModule mpm_prefork_module modules/mod_mpm_prefork.so　☆コメントアウト
# worker MPM: Multi-Processing Module implementing a hybrid
# multi-threaded multi-process web server
# See: http://httpd.apache.org/docs/2.4/mod/worker.html
#
#LoadModule mpm_worker_module modules/mod_mpm_worker.so
# event MPM: A variant of the worker MPM with the goal of consuming
# threads only for connections with active processing
# See: http://httpd.apache.org/docs/2.4/mod/event.html
#
LoadModule mpm_event_module modules/mod_mpm_event.so　★コメントアウトを外す

HostnameLookups off
<IfModule mpm_event_module>
# 最初に起動する子プロセスの数
StartServers 4
# アイドル状態のスレッド最小数
MinSpareThreads 25
# アイドル状態のスレッド最大数
MaxSpareThreads 25
# 子プロセスそれぞれに生成されるスレッド数
ThreadsPerChild 25
# 生成する子プロセスの最大数
MaxClients 100
ServerLimit 100
MaxRequestWorkers 100
# それぞれの子プロセスが扱うリクエスト数の制限数
MaxRequestsPerChild 1000
</IfModule>

; Start a new pool named ‘www’.
; the variable $pool can be used in any directive and will be replaced by the
; pool name (‘www’ here)
[www]
（中略）
; Choose how the process manager will control the number of child processes.
; Possible Values:
; static – a fixed number (pm.max_children) of child processes;
; dynamic – the number of child processes are set dynamically based on the
; following directives. With this process management, there will be
; always at least 1 children.
; pm.max_children – the maximum number of children that can
; be alive at the same time.
; pm.start_servers – the number of children created on startup.
; pm.min_spare_servers – the minimum number of children in ‘idle’
; state (waiting to process). If the number
; of ‘idle’ processes is less than this
; number then some children will be created.
; pm.max_spare_servers – the maximum number of children in ‘idle’
; state (waiting to process). If the number
; of ‘idle’ processes is greater than this
; number then some children will be killed.
; ondemand – no children are created at startup. Children will be forked when
; new requests will connect. The following parameter are used:
; pm.max_children – the maximum number of children that
; can be alive at the same time.
; pm.process_idle_timeout – The number of seconds after which
; an idle process will be killed.
; Note: This value is mandatory.
pm = dynamic
; The number of child processes to be created when pm is set to ‘static’ and the
; maximum number of child processes when pm is set to ‘dynamic’ or ‘ondemand’.
; This value sets the limit on the number of simultaneous requests that will be
; served. Equivalent to the ApacheMaxClients directive with mpm_prefork.
; Equivalent to the PHP_FCGI_CHILDREN environment variable in the original PHP
; CGI. The below defaults are based on a server without much resources. Don’t
; forget to tweak pm.* to fit your needs.
; Note: Used when pm is set to ‘static’, ‘dynamic’ or ‘ondemand’
; Note: This value is mandatory.
;pm.max_children = 50
pm.max_children = 5　★最大プロセス数。50は多すぎるので、1プロセス50MB（適当）×nと仮定して5に変更
; The number of child processes created on startup.
; Note: Used only when pm is set to ‘dynamic’
; Default Value: min_spare_servers + (max_spare_servers – min_spare_servers) / 2
;pm.start_servers = 5
pm.start_servers = 1　★起動時は1プロセスのみ
; The desired minimum number of idle server processes.
; Note: Used only when pm is set to ‘dynamic’
; Note: Mandatory when pm is set to ‘dynamic’
;pm.min_spare_servers = 5
pm.min_spare_servers = 1　★待機プロセス最小数は1プロセスのみ
; The desired maximum number of idle server processes.
; Note: Used only when pm is set to ‘dynamic’
; Note: Mandatory when pm is set to ‘dynamic’
;pm.max_spare_servers = 35
pm.max_spare_servers = 5　★待機プロセス最大数は5プロセスのみ
; The number of seconds after which an idle process will be killed.
; Note: Used only when pm is set to ‘ondemand’
; Default Value: 10s
;pm.process_idle_timeout = 10s;
; The number of requests each child process should execute before respawning.
; This can be useful to work around memory leaks in 3rd party libraries. For
; endless request processing specify ‘0’. Equivalent to PHP_FCGI_MAX_REQUESTS.
; Default Value: 0
;pm.max_requests = 500
pm.max_requests = 500　★１プロセスあたりの最大数のコメントアウトを外す
（省略）