我的Centos 6.7服务器只有我的基于php和mysql的低stream量网站（所有网站每天总共约3000页的浏览量）使用nginx web服务器和virtualmin（没有wordpress或外部脚本/软件）。
我安装了PHP：
yum --enablerepo=remi,remi-php56 install -y php-mysqlnd php-gd php-fpm yum安装了像php-commom，php-pdo等的依赖关系
我使用virtualmin在服务器上检查了正在运行的进程。
重新启动php-fpm之后，每个php-fpm：pool www进程都使用了大约400MB的内存。
etc / php.d目录中有20多个扩展名。
我评论了etc / php.d目录中的大部分扩展。
重新启动php-fpm和nginx之后，
我检查使用安装的扩展
<?php print_r(get_loaded_extensions()); ?>
这是结果：
[0] => Core [1] => date [2] => ereg [3] => libxml [4] => openssl [5] => pcre [6] => zlib [7] => filter [8] => hash [9] => Reflection [10] => SPL [11] => session [12] => standard [13] => cgi-fcgi [14] => curl [15] => ftp [16] => gd [17] => mysqlnd [18] => PDO [19] => mysql [20] => pdo_mysql [21] => json [22] => mhash
现在重新启动php-fpm之后， 每个php-fpm：pool www进程都在使用大约250MB的内存。
www.conf : pm = dynamic pm.max_children = 50 pm.start_servers = 5 pm.min_spare_servers = 5 pm.max_spare_servers = 35
在php.ini中
memory_limit = 128M
在virtualmin中运行进程：
Real memory: 31.19 GB total / 21.17 GB free / 20.24 GB cached Swap space: 1024 MB total / 341.19 MB free ID Owner Size Command 46929 mysql 10.48 GB /usr/sbin/mysqld --basedir=/usr --datadir=/home/mysql-data --plugin-dir=/var/lib ... 45061 dkim-milter 1.96 GB /usr/sbin/dkim-filter -x /etc/mail/dkim-milter/dkim-filter.conf -P /var/run/dkim ... 27380 sphinx 1.19 GB /usr/bin/searchd --config /etc/sphinx/sphinx.conf 45056 named 709.38 MB /usr/sbin/named -u named 56055 apache 614.07 MB php-fpm: pool www 25919 apache 317.67 MB php-fpm: pool www 19624 apache 305.90 MB php-fpm: pool www 16654 apache 300.36 MB php-fpm: pool www 24973 apache 295.33 MB php-fpm: pool www 24559 apache 291.47 MB php-fpm: pool www 30654 apache 285.20 MB php-fpm: pool www 50347 apache 285.09 MB php-fpm: pool www 19531 apache 254.57 MB php-fpm: pool www 33874 apache 254.42 MB php-fpm: pool www 15467 apache 253.65 MB php-fpm: pool www 42002 apache 253.01 MB php-fpm: pool www 40159 apache 251.92 MB php-fpm: pool www 48884 apache 251.05 MB php-fpm: pool www 1568 root 250.19 MB /sbin/rsyslogd -i /var/run/syslogd.pid -c 5 7628 apache 249.05 MB php-fpm: pool www 52524 apache 247.92 MB php-fpm: pool www 897 apache 247.14 MB php-fpm: pool www 19972 apache 246.92 MB php-fpm: pool www 44322 apache 246.64 MB php-fpm: pool www 56975 apache 246.50 MB php-fpm: pool www 28549 apache 246.42 MB php-fpm: pool www 25728 apache 246.09 MB php-fpm: pool www 65048 root 245.55 MB php-fpm: master process (/etc/php-fpm.conf) 46044 root 105.76 MB /bin/sh /usr/bin/mysqld_safe --datadir=/home/mysql-data --socket=/var/lib/mysql/ ... 43584 root 98.25 MB /usr/libexec/webmin/proc/index_size.cgi 59312 root 97.63 MB sshd: root@notty 27379 sphinx 90.30 MB /usr/bin/searchd --config /etc/sphinx/sphinx.conf 15861 root 86.25 MB /usr/bin/perl /usr/libexec/webmin/miniserv.pl /etc/webmin/miniserv.conf 43585 root 86.25 MB /usr/bin/perl /usr/libexec/webmin/miniserv.pl /etc/webmin/miniserv.conf 43589 root 86.25 MB /usr/bin/perl /usr/libexec/webmin/miniserv.pl /etc/webmin/miniserv.conf 35690 postfix 79.22 MB qmgr -l -t fifo -u 2723 postfix 79.05 MB pickup -l -t fifo -u 39868 root 78.97 MB /usr/libexec/postfix/master 24373 root 64.85 MB /usr/sbin/saslauthd -m /var/run/saslauthd -a pam -r 24374 root 64.85 MB /usr/sbin/saslauthd -m /var/run/saslauthd -a pam -r 24375 root 64.85 MB /usr/sbin/saslauthd -m /var/run/saslauthd -a pam -r 24376 root 64.85 MB /usr/sbin/saslauthd -m /var/run/saslauthd -a pam -r 24377 root 64.85 MB /usr/sbin/saslauthd -m /var/run/saslauthd -a pam -r 10485 root 64.67 MB /usr/sbin/sshd 59383 root 56.03 MB /usr/libexec/openssh/sftp-server 42540 nginx 54.42 MB nginx: worker process 42545 nginx 54.19 MB nginx: worker process 42539 nginx 53.52 MB nginx: worker process 42542 nginx 53.52 MB nginx: worker process 42543 nginx 53.36 MB nginx: worker process 42538 nginx 53.32 MB nginx: worker process 42546 nginx 53.32 MB nginx: worker process 42544 nginx 53.23 MB nginx: worker process 42537 root 49.33 MB nginx: master process /usr/sbin/nginx -c /etc/nginx/nginx.conf
Top的结果 ：按内存使用情况sorting：
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 46929 mysql 20 0 10.5g 5.3g 4992 S 1.0 17.0 369:43.82 mysqld 27380 sphinx 20 0 1218m 463m 433m S 6.0 1.5 266:34.64 searchd 56055 apache 20 0 614m 373m 3964 S 2.3 1.2 5:09.57 php-fpm 25919 apache 20 0 323m 84m 5260 S 4.0 0.3 3:32.51 php-fpm 19624 apache 20 0 306m 66m 5048 S 4.6 0.2 7:02.03 php-fpm 16654 apache 20 0 300m 60m 4288 S 0.3 0.2 0:49.27 php-fpm 24973 apache 20 0 295m 54m 3944 S 0.7 0.2 1:18.91 php-fpm 45056 named 20 0 709m 51m 2500 S 0.7 0.2 21:01.48 named 24559 apache 20 0 291m 51m 4988 S 0.0 0.2 1:08.85 php-fpm 50347 apache 20 0 286m 46m 4964 S 1.3 0.1 0:40.13 php-fpm 30654 apache 20 0 285m 34m 7400 S 0.7 0.1 2:09.37 php-fpm 15861 root 20 0 88320 17m 1888 S 0.0 0.1 0:10.77 miniserv.pl 15467 apache 20 0 253m 15m 5428 S 0.0 0.0 0:28.92 php-fpm 42002 apache 20 0 253m 14m 5036 S 0.0 0.0 0:01.19 php-fpm 33874 apache 20 0 254m 14m 4012 S 0.0 0.0 1:48.74 php-fpm 42540 nginx 20 0 55724 12m 1052 S 0.0 0.0 0:11.45 nginx 42545 nginx 20 0 55492 12m 1052 S 0.0 0.0 0:12.47 nginx 40159 apache 20 0 251m 12m 4036 S 0.0 0.0 0:01.16 php-fpm 42539 nginx 20 0 54804 11m 1056 S 0.0 0.0 0:11.76 nginx 42542 nginx 20 0 54804 11m 1052 S 0.0 0.0 0:12.55 nginx 42543 nginx 20 0 54636 11m 1052 S 0.0 0.0 0:12.48 nginx 42544 nginx 20 0 54508 11m 1056 S 0.0 0.0 0:11.07 nginx 42546 nginx 20 0 54604 11m 1052 S 0.0 0.0 0:12.52 nginx 42538 nginx 20 0 54604 11m 1052 S 0.0 0.0 0:13.75 nginx 48884 apache 20 0 251m 11m 3996 S 0.0 0.0 0:01.19 php-fpm 52524 apache 20 0 247m 9800 3452 S 0.0 0.0 0:01.17 php-fpm 7628 apache 20 0 249m 9296 3964 S 0.0 0.0 0:00.92 php-fpm 897 apache 20 0 247m 8824 3460 S 0.0 0.0 0:01.07 php-fpm 19972 apache 20 0 246m 8300 3472 S 0.0 0.0 0:00.79 php-fpm 25728 apache 20 0 246m 7680 3436 S 0.0 0.0 0:00.38 php-fpm 28549 apache 20 0 246m 7404 3056 S 0.0 0.0 0:00.31 php-fpm 44322 apache 20 0 246m 7300 3088 S 0.0 0.0 0:00.65 php-fpm 56975 apache 20 0 246m 7220 3116 S 0.0 0.0 0:00.51 php-fpm 17463 apache 20 0 246m 7208 2968 S 0.0 0.0 0:00.05 php-fpm 42537 root 20 0 50516 6936 296 S 0.0 0.0 0:00.00 nginx 1568 root 20 0 250m 6264 868 S 0.0 0.0 0:34.28 rsyslogd
单击以查看按内存使用情况sorting的最佳结果
请回复，如果你想知道更多的细节。
请build议。
谢谢。