1.爲什麼Nginx的性能要比Apache高得多？
這得益於Nginx使用了最新的epoll（Linux 2.6內核）和kqueue（freebsd）網絡I/O模型，而Apache則使用的是傳統的select模型。目前Linux下能夠承受高併發訪問的Squid、Memcached都採用的是epoll網絡I/O模型。
處理大量的連接的讀寫，Apache所採用的select網絡I/O模型非常低效。下面用一個比喻來解析Apache採用的select模型和Nginx採用的epoll模型進行之間的區別：
假設你在大學讀書，住的宿舍樓有很多間房間，你的朋友要來找你。select版宿管大媽就會帶着你的朋友挨個房間去找，直到找到你爲止。而epoll版宿管大媽會先記下每位同學的房間號，你的朋友來時，只需告訴你的朋友你住在哪個房間即可，不用親自帶着你的朋友滿大樓找人。如果來了10000個人，都要找自己住這棟樓的同學時，select版和epoll版宿管大媽，誰的效率更高，不言自明。同理，在高併發服務器中，輪詢I/O是最耗時間的操作之一，select和epoll的性能誰的性能更高，同樣十分明瞭。
2.lnmp環境的搭建
安裝步驟：
（系統要求：Linux 2.6+ 內核，本文中的Linux操作系統爲CentOS 5.3，另在RedHat AS4上也安裝成功）
一、獲取相關開源程序：
1、【適用CentOS操作系統】利用CentOS Linux系統自帶的yum命令安裝、升級所需的程序庫（RedHat等其他Linux發行版可從安裝光盤中找到這些程序庫的RPM包，進行安裝）：
sudo -s
LANG=C
yum -y install gcc gcc-c++ autoconf libjpeg libjpeg-devel libpng libpng-devel freetype freetype-devel libxml2 libxml2-devel zlib zlib-devel glibc glibc-devel glib2 glib2-devel bzip2 bzip2-devel ncurses ncurses-devel curl curl-devel e2fsprogs e2fsprogs-devel krb5 krb5-devel libidn libidn-devel openssl openssl-devel openldap openldap-devel nss_ldap openldap-clients openldap-servers
2、【適用RedHat操作系統】RedHat等其他Linux發行版可從安裝光盤中找到這些程序庫的RPM包（事先可通過類似“rpm -qa | grep libjpeg”的命令查看所需的RPM包是否存在，通常是“xxx-devel”不存在，需要安裝）。RedHat可以直接利用CentOS的RPM包安裝，以下是RPM包下載網址：
①、RedHat AS4 & CentOS 4
http://mirrors.163.com/centos/4/os/i386/CentOS/RPMS/
http://mirrors.163.com/centos/4/os/x86_64/CentOS/RPMS/
②、RedHat AS5 & CentOS 5
http://mirrors.163.com/centos/5/os/i386/CentOS/
http://mirrors.163.com/centos/5/os/x86_64/CentOS/
③、RPM包搜索網站
http://rpm.pbone.net/
http://www.rpmfind.net/
④、RedHat AS4 系統環境，通常情況下缺少的支持包安裝：
Ⅰ、i386 系統
wget http://blog.s135.com/soft/linux/nginx_php/rpm/i386/libjpeg-devel-6b-33.i386.rpm
rpm -ivh libjpeg-devel-6b-33.i386.rpm
wget http://blog.s135.com/soft/linux/nginx_php/rpm/i386/freetype-devel-2.1.9-1.i386.rpm
rpm -ivh freetype-devel-2.1.9-1.i386.rpm
wget http://blog.s135.com/soft/linux/nginx_php/rpm/i386/libpng-devel-1.2.7-1.i386.rpm
rpm -ivh libpng-devel-1.2.7-1.i386.rpm
Ⅱ、x86_64 系統
wget http://blog.s135.com/soft/linux/nginx_php/rpm/x86_64/libjpeg-devel-6b-33.x86_64.rpm
rpm -ivh libjpeg-devel-6b-33.x86_64.rpm
wget http://blog.s135.com/soft/linux/nginx_php/rpm/x86_64/freetype-devel-2.1.9-1.x86_64.rpm
rpm -ivh freetype-devel-2.1.9-1.x86_64.rpm
wget http://blog.s135.com/soft/linux/nginx_php/rpm/x86_64/libpng-devel-1.2.7-1.x86_64.rpm
rpm -ivh libpng-devel-1.2.7-1.x86_64.rpm
3、【適用CentOS、RedHat及其它Linux操作系統】下載程序源碼包：
本文中提到的所有開源軟件爲截止到2010年07月26日的最新穩定版。
①、從軟件的官方網站下載：
mkdir -p /data0/software
cd /data0/software
wget http://sysoev.ru/nginx/nginx-0.8.46.tar.gz
wget http://www.php.net/get/php-5.2.14.tar.gz/from/this/mirror
wget http://php-fpm.org/downloads/php-5.2.14-fpm-0.5.14.diff.gz
wget http://dev.mysql.com/get/Downloads/MySQL-5.5/mysql-5.5.3-m3.tar.gz/from/http://mysql.he.net/
wget http://ftp.gnu.org/pub/gnu/libiconv/libiconv-1.13.1.tar.gz
wget "http://downloads.sourceforge.net/mcrypt/libmcrypt-2.5.8.tar.gz?modtime=1171868460&big_mirror=0"
wget "http://downloads.sourceforge.net/mcrypt/mcrypt-2.6.8.tar.gz?modtime=1194463373&big_mirror=0"
wget http://pecl.php.net/get/memcache-2.2.5.tgz
wget "http://downloads.sourceforge.net/mhash/mhash-0.9.9.9.tar.gz?modtime=1175740843&big_mirror=0"
wget ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-8.10.tar.gz
wget http://bart.eaccelerator.net/source/0.9.6.1/eaccelerator-0.9.6.1.tar.bz2
wget http://pecl.php.net/get/PDO_MYSQL-1.0.2.tgz
wget http://blog.s135.com/soft/linux/nginx_php/imagick/ImageMagick.tar.gz
wget http://pecl.php.net/get/imagick-2.3.0.tgz
②、從blog.s135.com下載（比較穩定，只允許在本站，或者在Linux/Unix下通過Wget、Curl等命令下載以下軟件）：
mkdir -p /data0/software
cd /data0/software
wget http://blog.s135.com/soft/linux/nginx_php/nginx/nginx-0.8.46.tar.gz
wget http://blog.s135.com/soft/linux/nginx_php/php/php-5.2.14.tar.gz
wget http://blog.s135.com/soft/linux/nginx_php/phpfpm/php-5.2.14-fpm-0.5.14.diff.gz
wget http://blog.s135.com/soft/linux/nginx_php/mysql/mysql-5.5.3-m3.tar.gz
wget http://blog.s135.com/soft/linux/nginx_php/libiconv/libiconv-1.13.1.tar.gz
wget http://blog.s135.com/soft/linux/nginx_php/mcrypt/libmcrypt-2.5.8.tar.gz
wget http://blog.s135.com/soft/linux/nginx_php/mcrypt/mcrypt-2.6.8.tar.gz
wget http://blog.s135.com/soft/linux/nginx_php/memcache/memcache-2.2.5.tgz
wget http://blog.s135.com/soft/linux/nginx_php/mhash/mhash-0.9.9.9.tar.gz
wget http://blog.s135.com/soft/linux/nginx_php/pcre/pcre-8.10.tar.gz
wget http://blog.s135.com/soft/linux/nginx_php/eaccelerator/eaccelerator-0.9.6.1.tar.bz2
wget http://blog.s135.com/soft/linux/nginx_php/pdo/PDO_MYSQL-1.0.2.tgz
wget http://blog.s135.com/soft/linux/nginx_php/imagick/ImageMagick.tar.gz
wget http://blog.s135.com/soft/linux/nginx_php/imagick/imagick-2.3.0.tgz
二、安裝PHP 5.2.14（FastCGI模式）
1、編譯安裝PHP 5.2.14所需的支持庫：
tar zxvf libiconv-1.13.1.tar.gz
cd libiconv-1.13.1/
./configure --prefix=/usr/local
make
make install
cd ../
tar zxvf libmcrypt-2.5.8.tar.gz
cd libmcrypt-2.5.8/
./configure
make
make install
/sbin/ldconfig
cd libltdl/
./configure --enable-ltdl-install
make
make install
cd ../../
tar zxvf mhash-0.9.9.9.tar.gz
cd mhash-0.9.9.9/
./configure
make
make install
cd ../
ln -s /usr/local/lib/libmcrypt.la /usr/lib/libmcrypt.la
ln -s /usr/local/lib/libmcrypt.so /usr/lib/libmcrypt.so
ln -s /usr/local/lib/libmcrypt.so.4 /usr/lib/libmcrypt.so.4
ln -s /usr/local/lib/libmcrypt.so.4.4.8 /usr/lib/libmcrypt.so.4.4.8
ln -s /usr/local/lib/libmhash.a /usr/lib/libmhash.a
ln -s /usr/local/lib/libmhash.la /usr/lib/libmhash.la
ln -s /usr/local/lib/libmhash.so /usr/lib/libmhash.so
ln -s /usr/local/lib/libmhash.so.2 /usr/lib/libmhash.so.2
ln -s /usr/local/lib/libmhash.so.2.0.1 /usr/lib/libmhash.so.2.0.1
ln -s /usr/local/bin/libmcrypt-config /usr/bin/libmcrypt-config
tar zxvf mcrypt-2.6.8.tar.gz
cd mcrypt-2.6.8/
/sbin/ldconfig
./configure
make
make install
cd ../
2、編譯安裝MySQL 5.5.3-m3
/usr/sbin/groupadd mysql
/usr/sbin/useradd -g mysql mysql
tar zxvf mysql-5.5.3-m3.tar.gz
cd mysql-5.5.3-m3/
./configure --prefix=/usr/local/webserver/mysql/ --enable-assembler --with-extra-charsets=complex --enable-thread-safe-client --with-big-tables --with-readline --with-ssl --with-embedded-server --enable-local-infile --with-plugins=partition,innobase,myisammrg
make && make install
chmod +w /usr/local/webserver/mysql
chown -R mysql:mysql /usr/local/webserver/mysql
cd ../
附：以下爲附加步驟，如果你想在這臺服務器上運行MySQL數據庫，則執行以下幾步。如果你只是希望讓PHP支持MySQL擴展庫，能夠連接其他服務器上的MySQL數據庫，那麼，以下兩步無需執行。
①、創建MySQL數據庫存放目錄
mkdir -p /data0/mysql/3306/data/
mkdir -p /data0/mysql/3306/binlog/
mkdir -p /data0/mysql/3306/relaylog/
chown -R mysql:mysql /data0/mysql/
②、以mysql用戶帳號的身份建立數據表：
/usr/local/webserver/mysql/bin/mysql_install_db --basedir=/usr/local/webserver/mysql --datadir=/data0/mysql/3306/data --user=mysql
③、創建my.cnf配置文件：
vi /data0/mysql/3306/my.cnf
輸入以下內容：
引用
[client]
character-set-server = utf8
port = 3306
socket = /tmp/mysql.sock
[mysqld]
character-set-server = utf8
replicate-ignore-db = mysql
replicate-ignore-db = test
replicate-ignore-db = information_schema
user = mysql
port = 3306
socket = /tmp/mysql.sock
basedir = /usr/local/webserver/mysql
datadir = /data0/mysql/3306/data
log-error = /data0/mysql/3306/mysql_error.log
pid-file = /data0/mysql/3306/mysql.pid
open_files_limit = 10240
back_log = 600
max_connections = 5000
max_connect_errors = 6000
table_cache = 614
external-locking = FALSE
max_allowed_packet = 32M
sort_buffer_size = 1M
join_buffer_size = 1M
thread_cache_size = 300
#thread_concurrency = 8
query_cache_size = 512M
query_cache_limit = 2M
query_cache_min_res_unit = 2k
default-storage-engine = MyISAM
thread_stack = 192K
transaction_isolation = READ-COMMITTED
tmp_table_size = 246M
max_heap_table_size = 246M
long_query_time = 3
log-slave-updates
log-bin = /data0/mysql/3306/binlog/binlog
binlog_cache_size = 4M
binlog_format = MIXED
max_binlog_cache_size = 8M
max_binlog_size = 1G
relay-log-index = /data0/mysql/3306/relaylog/relaylog
relay-log-info-file = /data0/mysql/3306/relaylog/relaylog
relay-log = /data0/mysql/3306/relaylog/relaylog
expire_logs_days = 30
key_buffer_size = 256M
read_buffer_size = 1M
read_rnd_buffer_size = 16M
bulk_insert_buffer_size = 64M
myisam_sort_buffer_size = 128M
myisam_max_sort_file_size = 10G
myisam_repair_threads = 1
myisam_recover
interactive_timeout = 120
wait_timeout = 120
skip-name-resolve
#master-connect-retry = 10
slave-skip-errors = 1032,1062,126,1114,1146,1048,1396
#master-host = 192.168.1.2
#master-user = username
#master-password = password
#master-port = 3306
server-id = 1
innodb_additional_mem_pool_size = 16M
innodb_buffer_pool_size = 512M
innodb_data_file_path = ibdata1:256M:autoextend
innodb_file_io_threads = 4
innodb_thread_concurrency = 8
innodb_flush_log_at_trx_commit = 2
innodb_log_buffer_size = 16M
innodb_log_file_size = 128M
innodb_log_files_in_group = 3
innodb_max_dirty_pages_pct = 90
innodb_lock_wait_timeout = 120
innodb_file_per_table = 0
#log-slow-queries = /data0/mysql/3306/slow.log
#long_query_time = 10
[mysqldump]
quick
max_allowed_packet = 32M
④、創建管理MySQL數據庫的shell腳本：
vi /data0/mysql/3306/mysql
輸入以下內容（這裏的用戶名admin和密碼12345678接下來的步驟會創建）：
#!/bin/sh
mysql_port=3306
mysql_username="admin"
mysql_password="12345678"
function_start_mysql()
{
printf "Starting MySQL...\n"
/bin/sh /usr/local/webserver/mysql/bin/mysqld_safe --defaults-file=/data0/mysql/${mysql_port}/my.cnf 2>&1 > /dev/null &
}
function_stop_mysql()
{
printf "Stoping MySQL...\n"
/usr/local/webserver/mysql/bin/mysqladmin -u ${mysql_username} -p${mysql_password} -S /tmp/mysql.sock shutdown
}
function_restart_mysql()
{
printf "Restarting MySQL...\n"
function_stop_mysql
sleep 5
function_start_mysql
}
function_kill_mysql()
{
kill -9 $(ps -ef | grep 'bin/mysqld_safe' | grep ${mysql_port} | awk '{printf $2}')
kill -9 $(ps -ef | grep 'libexec/mysqld' | grep ${mysql_port} | awk '{printf $2}')
}
if [ "$1" = "start" ]; then
function_start_mysql
elif [ "$1" = "stop" ]; then
function_stop_mysql
elif [ "$1" = "restart" ]; then
function_restart_mysql
elif [ "$1" = "kill" ]; then
function_kill_mysql
else
printf "Usage: /data0/mysql/${mysql_port}/mysql {start|stop|restart|kill}\n"
fi
⑤、賦予shell腳本可執行權限：
chmod +x /data0/mysql/3306/mysql
⑥、啓動MySQL：
/data0/mysql/3306/mysql start
⑦、通過命令行登錄管理MySQL服務器（提示輸入密碼時直接回車）：
/usr/local/webserver/mysql/bin/mysql -u root -p -S /tmp/mysql.sock
⑧、輸入以下SQL語句，創建一個具有root權限的用戶（admin）和密碼（12345678）：
GRANT ALL PRIVILEGES ON *.* TO 'admin'@'localhost' IDENTIFIED BY '12345678';
GRANT ALL PRIVILEGES ON *.* TO 'admin'@'127.0.0.1' IDENTIFIED BY '12345678';
⑨、（可選）停止MySQL：
/data0/mysql/3306/mysql stop
3、編譯安裝PHP（FastCGI模式）
tar zxvf php-5.2.14.tar.gz
gzip -cd php-5.2.14-fpm-0.5.14.diff.gz | patch -d php-5.2.14 -p1
cd php-5.2.14/
./configure --prefix=/usr/local/webserver/php --with-config-file-path=/usr/local/webserver/php/etc --with-mysql=/usr/local/webserver/mysql --with-mysqli=/usr/local/webserver/mysql/bin/mysql_config --with-iconv-dir=/usr/local --with-freetype-dir --with-jpeg-dir --with-png-dir --with-zlib --with-libxml-dir=/usr --enable-xml --disable-rpath --enable-discard-path --enable-safe-mode --enable-bcmath --enable-shmop --enable-sysvsem --enable-inline-optimization --with-curl --with-curlwrappers --enable-mbregex --enable-fastcgi --enable-fpm --enable-force-cgi-redirect --enable-mbstring --with-mcrypt --with-gd --enable-gd-native-ttf --with-openssl --with-mhash --enable-pcntl --enable-sockets --with-ldap --with-ldap-sasl --with-xmlrpc --enable-zip --enable-soap
make ZEND_EXTRA_LIBS='-liconv'
make install
cp php.ini-dist /usr/local/webserver/php/etc/php.ini
cd ../
4、編譯安裝PHP5擴展模塊
tar zxvf memcache-2.2.5.tgz
cd memcache-2.2.5/
/usr/local/webserver/php/bin/phpize
./configure --with-php-config=/usr/local/webserver/php/bin/php-config
make
make install
cd ../
tar jxvf eaccelerator-0.9.6.1.tar.bz2
cd eaccelerator-0.9.6.1/
/usr/local/webserver/php/bin/phpize
./configure --enable-eaccelerator=shared --with-php-config=/usr/local/webserver/php/bin/php-config
make
make install
cd ../
tar zxvf PDO_MYSQL-1.0.2.tgz
cd PDO_MYSQL-1.0.2/
/usr/local/webserver/php/bin/phpize
./configure --with-php-config=/usr/local/webserver/php/bin/php-config --with-pdo-mysql=/usr/local/webserver/mysql
make
make install
cd ../
tar zxvf ImageMagick.tar.gz
cd ImageMagick-6.5.1-2/
./configure
make
make install
cd ../
tar zxvf imagick-2.3.0.tgz
cd imagick-2.3.0/
/usr/local/webserver/php/bin/phpize
./configure --with-php-config=/usr/local/webserver/php/bin/php-config
make
make install
cd ../
5、修改php.ini文件
手工修改：查找/usr/local/webserver/php/etc/php.ini中的extension_dir = "./"
修改爲extension_dir = "/usr/local/webserver/php/lib/php/extensions/no-debug-non-zts-20060613/"
並在此行後增加以下幾行，然後保存：
extension = "memcache.so"
extension = "pdo_mysql.so"
extension = "imagick.so"
再查找output_buffering = Off
修改爲output_buffering = On
再查找; cgi.fix_pathinfo=0
修改爲cgi.fix_pathinfo=0，防止Nginx文件類型錯誤解析漏洞。
自動修改：若嫌手工修改麻煩，可執行以下shell命令，自動完成對php.ini文件的修改：
sed -i 's#extension_dir = "./"#extension_dir = "/usr/local/webserver/php/lib/php/extensions/no-debug-non-zts-20060613/"\nextension = "memcache.so"\nextension = "pdo_mysql.so"\nextension = "imagick.so"\n#' /usr/local/webserver/php/etc/php.ini
sed -i 's#output_buffering = Off#output_buffering = On#' /usr/local/webserver/php/etc/php.ini
sed -i "s#; always_populate_raw_post_data = On#always_populate_raw_post_data = On#g" /usr/local/webserver/php/etc/php.ini
sed -i "s#; cgi.fix_pathinfo=0#cgi.fix_pathinfo=0#g" /usr/local/webserver/php/etc/php.ini
6、配置eAccelerator加速PHP：
mkdir -p /usr/local/webserver/eaccelerator_cache
vi /usr/local/webserver/php/etc/php.ini
按shift+g鍵跳到配置文件的最末尾，加上以下配置信息：
引用
[eaccelerator]
zend_extension="/usr/local/webserver/php/lib/php/extensions/no-debug-non-zts-20060613/eaccelerator.so"
eaccelerator.shm_size="64"
eaccelerator.cache_dir="/usr/local/webserver/eaccelerator_cache"
eaccelerator.enable="1"
eaccelerator.optimizer="1"
eaccelerator.check_mtime="1"
eaccelerator.debug="0"
eaccelerator.filter=""
eaccelerator.shm_max="0"
eaccelerator.shm_ttl="3600"
eaccelerator.shm_prune_period="3600"
eaccelerator.shm_only="0"
eaccelerator.compress="1"
eaccelerator.compress_level="9"
7、創建www用戶和組，以及供blog.s135.com和www.s135.com兩個虛擬主機使用的目錄：
/usr/sbin/groupadd www
/usr/sbin/useradd -g www www
mkdir -p /data0/htdocs/blog
chmod +w /data0/htdocs/blog
chown -R www:www /data0/htdocs/blog
mkdir -p /data0/htdocs/www
chmod +w /data0/htdocs/www
chown -R www:www /data0/htdocs/www
8、創建php-fpm配置文件（php-fpm是爲PHP打的一個FastCGI管理補丁，可以平滑變更php.ini配置而無需重啓php-cgi）：
在/usr/local/webserver/php/etc/目錄中創建php-fpm.conf文件：
rm -f /usr/local/webserver/php/etc/php-fpm.conf
vi /usr/local/webserver/php/etc/php-fpm.conf
輸入以下內容（如果您安裝 Nginx + PHP 用於程序調試，請將以下的<value name="display_errors">0</value>改爲<value name="display_errors">1</value>，以便顯示PHP錯誤信息，否則，Nginx 會報狀態爲500的空白錯誤頁）：
<?xml version="1.0" ?>
<configuration>
All relative paths in this config are relative to php's install prefix
<section name="global_options">
Pid file
<value name="pid_file">/usr/local/webserver/php/logs/php-fpm.pid</value>
Error log file
<value name="error_log">/usr/local/webserver/php/logs/php-fpm.log</value>
Log level
<value name="log_level">notice</value>
When this amount of php processes exited with SIGSEGV or SIGBUS ...
<value name="emergency_restart_threshold">10</value>
... in a less than this interval of time, a graceful restart will be initiated.
Useful to work around accidental curruptions in accelerator's shared memory.
<value name="emergency_restart_interval">1m</value>
Time limit on waiting child's reaction on signals from master
<value name="process_control_timeout">5s</value>
Set to 'no' to debug fpm
<value name="daemonize">yes</value>
</section>
<workers>
<section name="pool">
Name of pool. Used in logs and stats.
<value name="name">default</value>
Address to accept fastcgi requests on.
Valid syntax is 'ip.ad.re.ss:port' or just 'port' or '/path/to/unix/socket'
<value name="listen_address">127.0.0.1:9000</value>
<value name="listen_options">
Set listen(2) backlog
<value name="backlog">-1</value>
Set permissions for unix socket, if one used.
In Linux read/write permissions must be set in order to allow connections from web server.
Many BSD-derrived systems allow connections regardless of permissions.
<value name="owner"></value>
<value name="group"></value>
<value name="mode">0666</value>
</value>
Additional php.ini defines, specific to this pool of workers.
<value name="php_defines">
<value name="sendmail_path">/usr/sbin/sendmail -t -i</value>
<value name="display_errors">0</value>
</value>
Unix user of processes
<value name="user">www</value>
Unix group of processes
<value name="group">www</value>
Process manager settings
<value name="pm">
Sets style of controling worker process count.
Valid values are 'static' and 'apache-like'
<value name="style">static</value>
Sets the limit on the number of simultaneous requests that will be served.
Equivalent to Apache MaxClients directive.
Equivalent to PHP_FCGI_CHILDREN environment in original php.fcgi
Used with any pm_style.
<value name="max_children">128</value>
Settings group for 'apache-like' pm style
<value name="apache_like">
Sets the number of server processes created on startup.
Used only when 'apache-like' pm_style is selected
<value name="StartServers">20</value>
Sets the desired minimum number of idle server processes.
Used only when 'apache-like' pm_style is selected
<value name="MinSpareServers">5</value>
Sets the desired maximum number of idle server processes.
Used only when 'apache-like' pm_style is selected
<value name="MaxSpareServers">35</value>
</value>
</value>
The timeout (in seconds) for serving a single request after which the worker process will be terminated
Should be used when 'max_execution_time' ini option does not stop script execution for some reason
'0s' means 'off'
<value name="request_terminate_timeout">0s</value>
The timeout (in seconds) for serving of single request after which a php backtrace will be dumped to slow.log file
'0s' means 'off'
<value name="request_slowlog_timeout">0s</value>
The log file for slow requests
<value name="slowlog">logs/slow.log</value>
Set open file desc rlimit
<value name="rlimit_files">65535</value>
Set max core size rlimit
<value name="rlimit_core">0</value>
Chroot to this directory at the start, absolute path
<value name="chroot"></value>
Chdir to this directory at the start, absolute path
<value name="chdir"></value>
Redirect workers' stdout and stderr into main error log.
If not set, they will be redirected to /dev/null, according to FastCGI specs
<value name="catch_workers_output">yes</value>
How much requests each process should execute before respawn.
Useful to work around memory leaks in 3rd party libraries.
For endless request processing please specify 0
Equivalent to PHP_FCGI_MAX_REQUESTS
<value name="max_requests">1024</value>
Comma separated list of ipv4 addresses of FastCGI clients that allowed to connect.
Equivalent to FCGI_WEB_SERVER_ADDRS environment in original php.fcgi (5.2.2+)
Makes sense only with AF_INET listening socket.
<value name="allowed_clients">127.0.0.1</value>
Pass environment variables like LD_LIBRARY_PATH
All $VARIABLEs are taken from current environment
<value name="environment">
<value name="HOSTNAME">$HOSTNAME</value>
<value name="PATH">/usr/local/bin:/usr/bin:/bin</value>
<value name="TMP">/tmp</value>
<value name="TMPDIR">/tmp</value>
<value name="TEMP">/tmp</value>
<value name="OSTYPE">$OSTYPE</value>
<value name="MACHTYPE">$MACHTYPE</value>
<value name="MALLOC_CHECK_">2</value>
</value>
</section>
</workers>
</configuration>
9、啓動php-cgi進程，監聽127.0.0.1的9000端口，進程數爲128（如果服務器內存小於3GB，可以只開啓64個進程），用戶爲www：
ulimit -SHn 65535
/usr/local/webserver/php/sbin/php-fpm start
注：/usr/local/webserver/php/sbin/php-fpm還有其他參數，包括：start|stop|quit|restart|reload|logrotate，修改php.ini後不重啓php-cgi，重新加載配置文件使用reload。
三、安裝Nginx 0.8.46
1、安裝Nginx所需的pcre庫：
tar zxvf pcre-8.10.tar.gz
cd pcre-8.10/
./configure
make && make install
cd ../
2、安裝Nginx
tar zxvf nginx-0.8.46.tar.gz
cd nginx-0.8.46/
./configure --user=www --group=www --prefix=/usr/local/webserver/nginx --with-http_stub_status_module --with-http_ssl_module
make && make install
cd ../
3、創建Nginx日誌目錄
mkdir -p /data1/logs
chmod +w /data1/logs
chown -R www:www /data1/logs
4、創建Nginx配置文件
①、在/usr/local/webserver/nginx/conf/目錄中創建nginx.conf文件：
rm -f /usr/local/webserver/nginx/conf/nginx.conf
vi /usr/local/webserver/nginx/conf/nginx.conf
輸入以下內容：
引用
user www www;
worker_processes 8;
error_log /data1/logs/nginx_error.log crit;
pid /usr/local/webserver/nginx/nginx.pid;
#Specifies the value for maximum file descriptors that can be opened by this process.
worker_rlimit_nofile 65535;
events
{
use epoll;
worker_connections 65535;
}
http
{
include mime.types;
default_type application/octet-stream;
#charset gb2312;
server_names_hash_bucket_size 128;
client_header_buffer_size 32k;
large_client_header_buffers 4 32k;
client_max_body_size 8m;
sendfile on;
tcp_nopush on;
keepalive_timeout 60;
tcp_nodelay on;
fastcgi_connect_timeout 300;
fastcgi_send_timeout 300;
fastcgi_read_timeout 300;
fastcgi_buffer_size 64k;
fastcgi_buffers 4 64k;
fastcgi_busy_buffers_size 128k;
fastcgi_temp_file_write_size 128k;
gzip on;
gzip_min_length 1k;
gzip_buffers 4 16k;
gzip_http_version 1.0;
gzip_comp_level 2;
gzip_types text/plain application/x-javascript text/css application/xml;
gzip_vary on;
#limit_zone crawler $binary_remote_addr 10m;
server
{
listen 80;
server_name blog.s135.com;
index index.html index.htm index.php;
root /data0/htdocs/blog;
#limit_conn crawler 20;
location ~ .*\.(php|php5)?$
{
#fastcgi_pass unix:/tmp/php-cgi.sock;
fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
include fcgi.conf;
}
location ~ .*\.(gif|jpg|jpeg|png|bmp|swf)$
{
expires 30d;
}
location ~ .*\.(js|css)?$
{
expires 1h;
}
log_format access '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" $http_x_forwarded_for';
access_log /data1/logs/access.log access;
}
server
{
listen 80;
server_name www.s135.com;
index index.html index.htm index.php;
root /data0/htdocs/www;
location ~ .*\.(php|php5)?$
{
#fastcgi_pass unix:/tmp/php-cgi.sock;
fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
include fcgi.conf;
}
log_format wwwlogs '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" $http_x_forwarded_for';
access_log /data1/logs/wwwlogs.log wwwlogs;
}
server
{
listen 80;
server_name status.blog.s135.com;
location / {
stub_status on;
access_log off;
}
}
}
②、在/usr/local/webserver/nginx/conf/目錄中創建fcgi.conf文件：
vi /usr/local/webserver/nginx/conf/fcgi.conf
輸入以下內容：
引用
fastcgi_param GATEWAY_INTERFACE CGI/1.1;
fastcgi_param SERVER_SOFTWARE nginx;
fastcgi_param QUERY_STRING $query_string;
fastcgi_param REQUEST_METHOD $request_method;
fastcgi_param CONTENT_TYPE $content_type;
fastcgi_param CONTENT_LENGTH $content_length;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_param SCRIPT_NAME $fastcgi_script_name;
fastcgi_param REQUEST_URI $request_uri;
fastcgi_param DOCUMENT_URI $document_uri;
fastcgi_param DOCUMENT_ROOT $document_root;
fastcgi_param SERVER_PROTOCOL $server_protocol;
fastcgi_param REMOTE_ADDR $remote_addr;
fastcgi_param REMOTE_PORT $remote_port;
fastcgi_param SERVER_ADDR $server_addr;
fastcgi_param SERVER_PORT $server_port;
fastcgi_param SERVER_NAME $server_name;
# PHP only, required if PHP was built with --enable-force-cgi-redirect
fastcgi_param REDIRECT_STATUS 200;
5、啓動Nginx
ulimit -SHn 65535
/usr/local/webserver/nginx/sbin/nginx
四、配置開機自動啓動Nginx + PHP
vi /etc/rc.local
在末尾增加以下內容：
引用
ulimit -SHn 65535
/usr/local/webserver/php/sbin/php-fpm start
/usr/local/webserver/nginx/sbin/nginx
五、優化Linux內核參數
vi /etc/sysctl.conf
在末尾增加以下內容：
引用
# Add
net.ipv4.tcp_max_syn_backlog = 65536
net.core.netdev_max_backlog = 32768
net.core.somaxconn = 32768
net.core.wmem_default = 8388608
net.core.rmem_default = 8388608
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
net.ipv4.tcp_timestamps = 0
net.ipv4.tcp_synack_retries = 2
net.ipv4.tcp_syn_retries = 2
net.ipv4.tcp_tw_recycle = 1
#net.ipv4.tcp_tw_len = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_mem = 94500000 915000000 927000000
net.ipv4.tcp_max_orphans = 3276800
#net.ipv4.tcp_fin_timeout = 30
#net.ipv4.tcp_keepalive_time = 120
net.ipv4.ip_local_port_range = 1024 65535
使配置立即生效：
/sbin/sysctl -p
六、在不停止Nginx服務的情況下平滑變更Nginx配置
1、修改/usr/local/webserver/nginx/conf/nginx.conf配置文件後，請執行以下命令檢查配置文件是否正確：
/usr/local/webserver/nginx/sbin/nginx -t
如果屏幕顯示以下兩行信息，說明配置文件正確：
the configuration file /usr/local/webserver/nginx/conf/nginx.conf syntax is ok
the configuration file /usr/local/webserver/nginx/conf/nginx.conf was tested successfully
2、平滑重啓：
①、對於Nginx 0.8.x版本，現在平滑重啓Nginx配置非常簡單，執行以下命令即可：
/usr/local/webserver/nginx/sbin/nginx -s reload
②、對於Nginx 0.8.x之前的版本，平滑重啓稍微麻煩一些，按照以下步驟進行即可。輸入以下命令查看Nginx主進程號：
ps -ef | grep "nginx: master process" | grep -v "grep" | awk -F ' ' '{print $2}'
屏幕顯示的即爲Nginx主進程號，例如：
6302
這時，執行以下命令即可使修改過的Nginx配置文件生效：
kill -HUP 6302
或者無需這麼麻煩，找到Nginx的Pid文件：
kill -HUP `cat /usr/local/webserver/nginx/nginx.pid`
七、編寫每天定時切割Nginx日誌的腳本
1、創建腳本/usr/local/webserver/nginx/sbin/cut_nginx_log.sh
vi /usr/local/webserver/nginx/sbin/cut_nginx_log.sh
輸入以下內容：
引用
#!/bin/bash
# This script run at 00:00
# The Nginx logs path
logs_path="/usr/local/webserver/nginx/logs/"
mkdir -p ${logs_path}$(date -d "yesterday" +"%Y")/$(date -d "yesterday" +"%m")/
mv ${logs_path}access.log ${logs_path}$(date -d "yesterday" +"%Y")/$(date -d "yesterday" +"%m")/access_$(date -d "yesterday" +"%Y%m%d").log
kill -USR1 `cat /usr/local/webserver/nginx/nginx.pid`
2、設置crontab，每天凌晨00:00切割nginx訪問日誌
crontab -e
輸入以下內容：
引用
00 00 * * * /bin/bash /usr/local/webserver/nginx/sbin/cut_nginx_log.sh