Nginx PHP始终比Apache 2.2慢
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在比较使用Ubuntu 13.04上的完全库存包运行的Apache 2.2和Nginx 1.2.6的负载测试中,我一直看到Nginx PHP请求的性能低于Apache PHP的性能;如果可能的话,我正在寻找指导,以便在所有情况下使我们的Nginx性能高于Apache.
Apache设置是相当标准的,但Nginx设置是相当自定义的;它们列在基准测试结果下方.
我使用名为Siege v3.0.2(http://www.joedog.org/siege-home/)的基准测试工具为单个并发用户(c1),10个并发用户(c10)和100个并发用户(c100)生成结果;结果如下：
Apache结果：
Date & Time, Trans, Elap Time, Data Trans, Resp Time, Trans Rate, Throughput, Concurrent, OKAY, Failed
**** c1 Apache Static ****
2013-08-01 00:54:12, 5982, 59.23, 338, 0.01, 101.00, 5.71, 1.00, 5982, 0
**** c1 Apache PHP ****
2013-08-01 00:55:12, 549, 59.98, 88, 0.11, 9.15, 1.47, 1.00, 549, 0
**** c1 Apache Combined ****
2013-08-01 00:56:12, 1609, 59.98, 139, 0.04, 26.83, 2.32, 1.00, 1609, 0
**** c10 Apache Static ****
2013-08-01 00:57:12, 35983, 59.97, 2039, 0.02, 600.02, 34.00, 9.99, 35983, 0
**** c10 Apache PHP ****
2013-08-01 00:58:12, 3769, 59.98, 610, 0.16, 62.84, 10.17, 9.99, 3769, 0
**** c10 Apache Combined ****
2013-08-01 00:59:12, 10928, 59.98, 947, 0.05, 182.19, 15.79, 9.99, 10928, 0
**** c100 Apache Static ****
2013-08-01 01:00:12, 44581, 59.97, 2523, 0.13, 743.39, 42.07, 98.63, 44581, 0
**** c100 Apache PHP ****
2013-08-01 01:01:12, 4427, 59.98, 721, 1.32, 73.81, 12.02, 97.34, 4427, 1
**** c100 Apache Combined ****
2013-08-01 01:02:12, 12735, 59.98, 1125, 0.47, 212.32, 18.76, 99.68, 12735, 0
Nginx结果：
Date & Time, Trans, Elap Time, Data Trans, Resp Time, Trans Rate, Throughput, Concurrent, OKAY, Failed
**** c1 Nginx Static ****
2013-08-01 02:36:13, 9040, 59.10, 274, 0.01, 152.96, 4.64, 1.00, 9040, 0
**** c1 Nginx PHP ****
2013-08-01 02:37:13, 581, 59.98, 18, 0.10, 9.69, 0.30, 1.00, 581, 0
**** c1 Nginx Combined ****
2013-08-01 02:38:13, 1786, 59.59, 55, 0.03, 29.97, 0.92, 1.00, 1786, 0
**** c10 Nginx Static ****
2013-08-01 02:39:13, 44557, 59.98, 1353, 0.01, 742.86, 22.56, 9.99, 44557, 0
**** c10 Nginx PHP ****
2013-08-01 02:40:13, 3766, 59.98, 120, 0.16, 62.79, 2.00, 9.98, 3766, 0
**** c10 Nginx Combined ****
2013-08-01 02:41:13, 10962, 59.98, 339, 0.05, 182.76, 5.65, 9.98, 10962, 0
**** c100 Nginx Static ****
2013-08-01 02:42:13, 54463, 59.98, 1642, 0.11, 908.02, 27.38, 99.70, 54463, 0
**** c100 Nginx PHP ****
2013-08-01 02:43:13, 3649, 59.98, 117, 1.62, 60.84, 1.95, 98.70, 3649, 0
**** c100 Nginx Combined ****
2013-08-01 02:44:13, 10802, 59.98, 334, 0.55, 180.09, 5.57, 98.63, 10802, 0
我关心的数据来自c100“PHP”和“Combined”结果. Apache的速度要快得多,我想知道如果在线显示相反的所有基准测试,这是多么可能.
两台服务器都是：
>在四核Xeon处理器上运行
> 8GB RAM
>连接到同一网络上的MongoDB v2.2数据库
> PHP-FPM设置为使用100个PHP进程
Apache(设置非常接近库存)：
>在CentOS 5上运行
> Apache 2.2
> mod_php
Nginx的：
> Ubuntu 13.04
> Nginx 1.2.6
> PHP-FPM(FastCGI),包含100个PHP进程
nginx.conf
pid /run/nginx.pid;
user www-data;
worker_processes 4;
events {
worker_connections 1024;
}
http {
# APACHE BACKWARDS COMPATIBILITY ENVIRONMENT VARIABLES
map $request_uri $my_script_url {
default $request_uri;
~^(?<script_filename>.+\.(php))(.*)?$$script_filename; #/test.php or /test.php?hello=world
~^(?<script_filename>.*)(\?.*)$$script_filename; #/tos?hello=world
~^(?<script_filename>.*)(\?.*)?$$script_filename; #/tos or /tos/hello/world or /tos/hello/world?omg=what
}
# BASE SETTINGS
charset utf-8;
default_type application/octet-stream;
include /etc/nginx/mime.types;
server_tokens off;
# CLIENT CACHING SETTINGS
add_header Last-Modified "";
expires 7d;
# CONNECTION SETTINGS
client_body_timeout 15s;
client_header_timeout 30s;
client_max_body_size 8m;
keepalive_requests 10000;
keepalive_timeout 30s;
reset_timedout_connection on;
resolver_timeout 5s;
send_timeout 15s;
tcp_nopush on;
# FASTCGI SETTINGS
# fastcgi_cache_path /var/cache/nginx levels=1:2 keys_zone=microcache:10m max_size=1000m inactive=60m;
# FILE CACHING AND PERFORMANCE SETTINGS
open_file_cache max=10000 inactive=20s;
open_file_cache_errors off;
open_file_cache_min_uses 2;
open_file_cache_valid 30s;
sendfile on;
# GZIP SETTINGS
gzip on;
gzip_comp_level 5;
gzip_min_length 1024;
gzip_proxied any;
gzip_types
text/css
text/plain
text/javascript
application/javascript
application/json
application/x-javascript
application/xml
application/xml+rss
application/xhtml+xml
application/x-font-ttf
application/x-font-opentype
application/vnd.ms-fontobject
image/svg+xml
image/x-icon
application/rss+xml
application/atom_xml;
gzip_vary on;
# LOGGING SETTINGS
access_log /var/log/nginx/access.log combined buffer=16k;
error_log /var/log/nginx/error.log crit;
open_log_file_cache max=100 inactive=1m min_uses=1 valid=2m;
# SSL SETTINGS
# ssl_ciphers !aNULL:!eNULL:FIPS@STRENGTH;
# ssl_prefer_server_ciphers on;
# ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
# ssl_session_cache shared:SSL:10m;
# ssl_session_timeout 3m;
# OTHER GLOBAL CONFIGURATION FILES
include /etc/nginx/conf.d/*.conf;
# VIRTUAL HOST CONFIGS
include /etc/nginx/sites-enabled/*;
}
虚拟主机配置
server {
# BASE SETTINGS
listen 80;
root /var/www/tbi/example/htdocs;
# server_name local.example.com;
server_name www.example.com;
# LOG SETTINGS
access_log /var/log/nginx/www.example.com.access.log combined buffer=64k;
error_log /var/log/nginx/www.example.com.error.log crit;
# LOCATIONS
location / {
index index.php index.html;
try_files $uri @extensionless-php;
}
location ~ \.(ttf|otf|eot|woff)${
add_header Access-Control-Allow-Origin *;
}
# location /nginx_status {
# See a brief synopsis of real-time, instantaneous performance
# stub_status on;
# }
location ~ \.php${
expires off;
# FASTCGI SETTINGS
fastcgi_index index.php;
fastcgi_pass unix:/var/run/php5-fpm.sock;
fastcgi_split_path_info ^(.+\.php)(/.+)$;
include fastcgi_params;
# FASTCGI CACHE SETTINGS
# fastcgi_cache microcache;
# fastcgi_cache_bypass $http_pragma;
# fastcgi_cache_key $scheme$host$request_uri$request_method;
# fastcgi_cache_methods GET HEAD;
# fastcgi_cache_use_stale updating error timeout invalid_header http_500;
# fastcgi_cache_valid any 1m;
# fastcgi_ignore_headers "Cache-Control" "Expires" "Set-Cookie";
# TBI ENVIRONMENT VARIABLES
fastcgi_param TBI_CONFIG /var/www/tbi/configs/;
fastcgi_param TBI_DOMAIN example.com;
# fastcgi_param TBI_ENV local;
fastcgi_param TBI_ENV www;
fastcgi_param TBI_RELEASETIME 0;
# APACHE BACKWARDS COMPATIBILITY ENVIRONMENT VARIABLES
fastcgi_param SCRIPT_URI $scheme://$http_host$my_script_url;
fastcgi_param SCRIPT_URL $my_script_url;
}
location @extensionless-php {
if (-f $request_filename.php) {
rewrite ^/(.*)$/$1.php last;
}
rewrite ^/(.*)$/index.php?$1 last;
}
}
任何有关使Nginx更快的建议都将非常感激.如果可能的话,我想避免内核和TCP / IP调优.
解决方法:
Apache和nginx之间的PHP性能应该非常相似,因为PHP比使用的服务器瓶颈要高得多.
在你的情况下,当concurrency = 1或concurrency = 10时,性能看起来相同,当并发性为100时,nginx / PHP-FPM上的性能变得更慢.
尽管您可以假设,并行运行更多PHP-FPM进程并不会导致许多并发查询的性能更快.在某一点之后,PHP并没有从并行运行中获益.在一点之后,并行的更多进程可能会因为额外的上下文切换,更多随机争用I / O访问,更高内存使用等而降低总体吞吐量.
在我的测试中,PHP-FPM过程中的最佳位置是大约6到10(我使用8).即使在测试数百个并发连接时,这也使我获得了最高性能.之后添加更多PHP-FPM流程开始减慢速度.您的里程可能会有所不同,但100不太可能成为任何服务器的最佳选择.
请注意,您的PHP-FPM进程数不必等于或大于您支持的并发连接数.为了更好地解释 – 拥有8个PHP-FPM进程并不意味着您只能使用8个并发连接.只要PHP-FPM中的listen.backlog足够高,您的服务器(nginx)仍将保持数百个并发连接,但PHP-FPM将在内部一次处理8个,而不是一次性处理它们.这意味着每个单独的查询将花费更少的时间实际执行PHP,因为它与更少的其他进程争用.这些连接仍将同时保持打开状态,并且对数百个并发用户进行测试仍然可以快速,成功地查看所有请求.
请注意,我还发现了另一种在我的nginx设置上加速PHP的方法,那就是增加fastcgi_buffers的数量/大小.我目前设置为fastcgi_buffers 32 16k;
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