Nginx和php-fpm：无法摆脱502和504错误
2022-08-30 23:47:12
我有一个ubuntu服务器和一个相当高负载的网站。服务器是：
- 专用于nginx，使用php-fpm（没有apache），mysql位于不同的机器上
- 具有 8 GB 内存
- 每秒获取大约 2000 个请求。
根据命令，每个php-fpm进程消耗大约65MB的RAM：top
可用内存：
admin@myserver:~$ free -m
total used free shared buffers cached
Mem: 7910 7156 753 0 284 2502
-/+ buffers/cache: 4369 3540
Swap: 8099 0 8099
问题
最近，我遇到了很大的性能问题。非常大的响应时间，非常多，在晚上，当负载变得很高时，90%的用户只看到“找不到服务器”而不是网站（我似乎无法重现这个）Gateway Timeouts
原木
我的Nginx错误日志充满了休眠消息：
2012/07/18 20:36:48 [error] 3451#0: *241904 upstream prematurely closed connection while reading response header from upstream, client: 178.49.30.245, server: example.net, request: request: "GET /readarticle/121430 HTTP/1.1", upstream: "fastcgi://127.0.0.1:9001", host: "example.net", referrer: "http://example.net/articles"
我尝试切换到unix套接字，但仍然得到这些错误：
2012/07/18 19:27:30 [crit] 2275#0: *12334 connect() to unix:/tmp/fastcgi.sock failed (2: No such file or directory) while connecting to upstream, client: 84.
237.189.45, server: example.net, request: "GET /readarticle/121430 HTTP/1.1", upstream: "fastcgi://unix:/tmp/fastcgi.sock:", host: "example.net", referrer: "http
://example.net/articles"
php-fpm日志充满了这些：
[18-Jul-2012 19:23:34] WARNING: [pool www] seems busy (you may need to increase pm.start_servers, or pm.min/max_spare_servers), spawning 32 children, there are 0 idle, and 75 total children
我试图将给定的参数增加到 ，但似乎仍然不够。100
配置
这是我当前的配置
php-fpm
listen = 127.0.0.1:9001
listen.backlog = 4096
pm = dynamic
pm.max_children = 130
pm.start_servers = 40
pm.min_spare_servers = 10
pm.max_spare_servers = 40
pm.max_requests = 100
恩金克斯
worker_processes 4;
worker_rlimit_nofile 8192;
worker_priority 0;
worker_cpu_affinity 0001 0010 0100 1000;
error_log /var/log/nginx_errors.log;
events {
multi_accept off;
worker_connections 4096;
}
http {
include mime.types;
default_type application/octet-stream;
access_log off;
sendfile on;
keepalive_timeout 65;
gzip on;
# fastcgi parameters
fastcgi_connect_timeout 120;
fastcgi_send_timeout 180;
fastcgi_read_timeout 1000;
fastcgi_buffer_size 128k;
fastcgi_buffers 4 256k;
fastcgi_busy_buffers_size 256k;
fastcgi_temp_file_write_size 256k;
fastcgi_intercept_errors on;
client_max_body_size 128M;
server {
server_name example.net;
root /var/www/example/httpdocs;
index index.php;
charset utf-8;
error_log /var/www/example/nginx_error.log;
error_page 502 504 = /gateway_timeout.html;
# rewrite rule
location / {
if (!-e $request_filename) {
rewrite ^(.*)$ /index.php?path=$1 last;
}
}
location ~* \.php {
fastcgi_pass 127.0.0.1:9001;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_param PATH_INFO $fastcgi_script_name;
include fastcgi_params;
}
}
}
如果能就如何识别问题以及我可以调整哪些参数来解决此问题，我将不胜感激。或者也许8GB的RAM对于这种负载来说还不够？
