PHP-FPM
FPM (FastCGI Process Manager) は PHP の FastCGI 実装のひとつで、 主に高負荷のサイトで有用
PHP 5.3.3以降、Apacheに組み込まれた（---enable-fpmで有効になる）
設定ファイルは/etc/php-fpm.conf
概念図
https://www.bnote.net/centos/php-fpm_on_nginx.html
個別のプロセスがたつ
詳しくは
PHP: FastCGI Process Manager (FPM) - Manual
アーキテクチャ
https://qiita.com/prograti/items/e29210300232e4a3d8b7#php-fpm
PHP自体のライフサイクル
PHP-FPMのモデル
1プロセス1リクエスト
マルチプロセス
マスタープロセスがワーカーを管理
ワーカーはキューからリクエストを取り出して実行
code:zsh
root@6843f207c151 /# php-fpm -i | grep ini
Configuration File (php.ini) Path => /etc
Loaded Configuration File => /etc/php.ini
Scan this dir for additional .ini files => /etc/php.d
Additional .ini files parsed => /etc/php.d/20-bz2.ini,
/etc/php.d/20-calendar.ini,
/etc/php.d/20-ctype.ini,
/etc/php.d/20-curl.ini,
/etc/php.d/20-exif.ini,
/etc/php.d/20-fileinfo.ini,
/etc/php.d/20-ftp.ini,
/etc/php.d/20-gettext.ini,
/etc/php.d/20-iconv.ini,
/etc/php.d/20-phar.ini,
/etc/php.d/20-sockets.ini,
/etc/php.d/20-tokenizer.ini
user_ini.cache_ttl => 300 => 300
user_ini.filename => .user.ini => .user.ini
Classes => AppendIterator, ArrayIterator, ArrayObject, BadFunctionCallException, BadMethodCallException, CachingIterator, CallbackFilterIterator, DirectoryIterator, DomainException, EmptyIterator, FilesystemIterator, FilterIterator, GlobIterator, InfiniteIterator, InvalidArgumentException, IteratorIterator, LengthException, LimitIterator, LogicException, MultipleIterator, NoRewindIterator, OutOfBoundsException, OutOfRangeException, OverflowException, ParentIterator, RangeException, RecursiveArrayIterator, RecursiveCachingIterator, RecursiveCallbackFilterIterator, RecursiveDirectoryIterator, RecursiveFilterIterator, RecursiveIteratorIterator, RecursiveRegexIterator, RecursiveTreeIterator, RegexIterator, RuntimeException, SplDoublyLinkedList, SplFileInfo, SplFileObject, SplFixedArray, SplHeap, SplMinHeap, SplMaxHeap, SplObjectStorage, SplPriorityQueue, SplQueue, SplStack, SplTempFileObject, UnderflowException, UnexpectedValueException