我目前在服务器上为我的网站运行 Nginx + PHP-FPM。今天当我运行 Apache“ab”工具时,我注意到响应时间非常糟糕,平均响应时间为 5595 毫秒,最大响应时间为 17415 毫秒。
我的 Nginx 配置文件:
worker_processes 4;
error_log /var/log/nginx/error.log info;
events {
worker_connections 1024;
use epoll;
multi_accept on;
}
http {
server_name_in_redirect off;
server_names_hash_max_size 10240;
server_names_hash_bucket_size 1024;
include mime.types;
default_type application/octet-stream;
index index.html index.htm index.php;
server_tokens off;
sendfile on;
tcp_nopush on;
tcp_nodelay on;
keepalive_timeout 15;
gzip on;
gzip_vary on;
gzip_disable "MSIE [1-6]\.";
gzip_proxied any;
gzip_http_version 1.1;
gzip_min_length 1400;
gzip_comp_level 9;
gzip_buffers 16 8k;
gzip_types text/plain text/xml text/css application/x-javascript application/xml image/png image/x-icon image/gif image/jpeg application/xml+rss text/javascript application/atom+xml;
ignore_invalid_headers on;
client_header_timeout 10m;
client_body_timeout 10m;
send_timeout 10m;
recursive_error_pages on;
keepalive_requests 100;
reset_timedout_connection on;
connection_pool_size 256;
client_header_buffer_size 256k;
large_client_header_buffers 4 256k;
client_max_body_size 200M;
client_body_buffer_size 128k;
request_pool_size 32k;
output_buffers 4 32k;
postpone_output 1460;
proxy_temp_path /tmp/nginx_proxy/;
client_body_in_file_only on;
log_format bytes_log "$msec $bytes_sent .";
## Proxy options
proxy_buffering on;
proxy_cache_min_uses 3;
proxy_cache_path /etc/nginx/proxy_temp/ levels=1:2 keys_zone=cache:10m inactive=10m max_size=1000M;
proxy_cache_valid any 10m;
proxy_ignore_client_abort off;
proxy_intercept_errors on;
proxy_next_upstream error timeout invalid_header;
proxy_redirect off;
proxy_set_header X-Forwarded-For $remote_addr;
proxy_connect_timeout 60;
proxy_send_timeout 60;
proxy_read_timeout 60;
include "/etc/nginx/vhosts/*";
}
我的 PHP-FPM 配置(仅相关参数):
pm = dynamic
pm.max_children = 50
pm.start_servers = 5
pm.min_spare_servers = 5
pm.max_spare_servers = 50
[..]
php_admin_value[cgi.fix_pathinfo] = 0
php_admin_value[memory_limit] = 128M
我的服务器
CPU Intel i3-540 3.06GHz with 4 processors
6GB RAM
CentOS 5.6 x64
# ulimit -n
65535
基准绘制图形http://imm.io/awLk
差点忘了,php-fpm 是由 nginx 处理的:
server {
[..]
location ~ \.php$ {
fastcgi_split_path_info ^(.+\.php)(.*)$;
fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
include fastcgi_params;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_param PATH_TRANSLATED $document_root$fastcgi_script_name;
fastcgi_param SERVER_NAME $http_host;
fastcgi_ignore_client_abort off;
}
[..]
}
有人能给我一些关于如何优化它的建议吗?
答案1
你正在对 PHP 进行基准测试,而不是 Nginx。要使用 PHP 实现每秒 600 多个请求,需要一些非常可靠的代码和相当快的服务器。
你可能误以为 Nginx 就像 Apache 一样,但这与事实相去甚远。在典型的设置中,Apache 会将 PHP 可执行文件嵌入到其自己的进程中。
你说是的the php-fpm is handled by nginx:
,但事实并非如此。PHP 通过 fastcgi 传递给 php-fpm。Fastcgi 只是一种通信协议。PHP 由 PHP 本身处理,如果您想优化它,您应该优化您的 PHP 代码。
答案2
您的 pm.max_spare_servers = 50 太高。请尝试使用此配置:
pm = dynamic
pm.max_children = 30
pm.start_servers = 2
pm.min_spare_servers = 2
pm.max_spare_servers = 4
pm.max_requests = 500
读这了解参数及其计算方法。