![Nginx 下载文件突然变慢](https://linux22.com/image/1601402/Nginx%20%E4%B8%8B%E8%BD%BD%E6%96%87%E4%BB%B6%E7%AA%81%E7%84%B6%E5%8F%98%E6%85%A2.png)
从一周前开始,Nginx 在下载小文件和提供内容时变得非常慢。例如,在同一台服务器上下载 500kb 文件需要 10 毫秒到 6 秒。感觉好像它受到了某种限制。奇怪的是,在过去的几个月里我没有更改任何 Nginx 配置文件。
所以我检查了一下我的服务器是否出了问题。我通过 sftp 上传和下载了一个文件,在 1gb 连接上达到了 900mb/s。我还检查了 CPU 和磁盘使用情况,但一切似乎都正常。
我用 Postman 做了一些测试,发现实际 HTTP 响应本身的时间是几毫秒,但之后下载文件需要很长时间。
当我使用 HTTP 而不是 HTTPS 时,这种情况也很奇怪。HTTPS 在本地网络上完全可以正常工作,但如果我从网络外部通过 HTTPS 下载相同的文件,速度又会变慢。HTTP 总是很慢。
我不知道现在该做什么,或者我还能检查什么。我还创建了一个具有相同配置的新 Ubuntu VM,并且在那里遇到了同样的问题,所以我猜是配置出了问题,但我不知道是什么。
这是我的 nginx.conf 文件
user www-data;
worker_processes auto;
pid /run/nginx.pid;
include /etc/nginx/modules-enabled/*.conf;
events {
worker_connections 768;
# multi_accept on;
}
http {
##
# Basic Settings
##
sendfile on;
tcp_nopush on;
tcp_nodelay on;
keepalive_timeout 65;
types_hash_max_size 2048;
# server_tokens off;
# server_names_hash_bucket_size 64;
# server_name_in_redirect off;
include /etc/nginx/mime.types;
default_type application/octet-stream;
##
# SSL Settings
##
ssl_protocols TLSv1 TLSv1.1 TLSv1.2; # Dropping SSLv3, ref: POODLE
ssl_prefer_server_ciphers on;
##
# Logging Settings
##
access_log /var/log/nginx/access.log;
error_log /var/log/nginx/error.log;
##
# Gzip Settings
##
gzip on;
gzip_vary on;
gzip_proxied any;
gzip_comp_level 6;
gzip_buffers 16 8k;
gzip_http_version 1.1;
gzip_min_length 256;
#gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;
gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript application/vnd.ms-fontobject application/x-font-ttf font/opentype image/svg+xml image/x-icon;
##
# Virtual Host Configs
##
include /etc/nginx/conf.d/*.conf;
include /etc/nginx/sites-enabled/*;
### Include a blocklist file
include /etc/nginx/nginx-acces.conf;
}
#mail {
# # See sample authentication script at:
# # http://wiki.nginx.org/ImapAuthenticateWithApachePhpScript
#
# # auth_http localhost/auth.php;
# # pop3_capabilities "TOP" "USER";
# # imap_capabilities "IMAP4rev1" "UIDPLUS";
#
# server {
# listen localhost:110;
# protocol pop3;
# proxy on;
# }
#
# server {
# listen localhost:143;
# protocol imap;
# proxy on;
# }
#}
这是我的站点启用的配置之一:
server {
server_name resources.example.io www.resources.example.io;
location / {
proxy_set_header X-Forwarded-Host $host;
proxy_set_header X-Forwarded-Server $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_pass http://192.168.1.105:8083;
allow all;
}
listen 443 ssl; # managed by Certbot
ssl_certificate /etc/letsencrypt/live/resources.example.io/fullchain.pem; # managed by Certbot
ssl_certificate_key /etc/letsencrypt/live/resources.example.io/privkey.pem; # managed by Certbot
include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
}
server {
if ($host = resources.example.io) {
return 301 https://$host$request_uri;
} # managed by Certbot
server_name resources.example.io www.resources.example.io;
listen 80;
return 404; # managed by Certbot
}