我在一台機器上運行多個項目，下麵包含所有資訊。
在 nginx 配置中，如果PHP項目使用 fastcgi 快取，Node.js項目使用proxy_pass，以及所有項目使用gzip。
我是維護伺服器的新手，我的問題是所有專案運行測試，例如http://www.webpagetest.org/ 第一個位元組的時間太長，我搜尋了幾個星期，但找不到原因？想知道這些結果是否是這台機器的瓶頸？還是我錯過了什麼？任何建議表示讚賞！
domain1.com - 690 ms First Byte Time, 6 ms Target First Byte Time
sub.domain2.com - 509 ms First Byte Time, 6 ms Target First Byte Time
domain4.com -1772 ms First Byte Time, 9 ms Target First Byte Time
背景資訊
linode
1 GB RAM
1 CPU Core
24 GB SSD Storage
2 TB Transfer
40 Gbps Network In
125 Mbps Network Out
nginx
PHP
Node.js
PostgreSQL
nginx 設定
server {
listen 80;
server_name domain1.com www.domain1.com;
access_log /var/log/nginx/domain1.com.access.log;
root /var/www/html/domain1.com;
index index.php index.html index.htm;
try_files $uri $uri/ /index.php?$query_string;
client_max_body_size 1G;
location ~ \.php$ {
fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
include /etc/nginx/fastcgi_params;
fastcgi_connect_timeout 300;
fastcgi_send_timeout 300;
fastcgi_read_timeout 300;
fastcgi_buffer_size 32k;
fastcgi_buffers 8 32k;
# cache
fastcgi_cache domain1.com;
fastcgi_cache_valid 200 60m;
fastcgi_cache_methods GET HEAD;
fastcgi_cache_key $scheme$request_method$host$request_uri;
fastcgi_ignore_headers Cache-Control Expires Set-Cookie;
}
}
server {
listen 80;
server_name sub.domain1.com www.sub.domain1.com;
access_log /var/log/nginx/sub.domain1.com.access.log;
root /var/www/html/sub.domain1.com;
index index.php index.html index.htm;
try_files $uri $uri/ /index.php?$query_string;
client_max_body_size 1G;
location ~ \.php$ {
fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
include /etc/nginx/fastcgi_params;
fastcgi_connect_timeout 300;
fastcgi_send_timeout 300;
fastcgi_read_timeout 300;
fastcgi_buffer_size 32k;
fastcgi_buffers 8 32k;
# cache
fastcgi_cache sub.domain1.com;
fastcgi_cache_valid 200 60m;
fastcgi_cache_methods GET HEAD;
fastcgi_cache_key $scheme$request_method$host$request_uri;
fastcgi_ignore_headers Cache-Control Expires Set-Cookie;
}
}
server {
listen 80;
server_name domain2 www.domain2;
access_log /var/log/nginx/domain2.access.log;
location / {
proxy_pass http://127.00.0.1:8001/;
}
}
server {
listen 80;
server_name sub.domain2 www.sub.domain2;
access_log /var/log/nginx/sub.domain2.access.log;
location ~ ^/sitemap/(.*)$ {
root /var/www/html/sub.domain2/app/Sitemap/SitemapGz;
}
location /robots.txt {
alias /var/www/html/sub.domain2/app/robots.txt;
}
location ~ ^/(images/|javascripts/|stylesheets/|fonts) {
root /var/www/html/sub.domain2/app/assets;
access_log off;
expires max;
}
location / {
set $fixed_destination $http_destination;
if ( $http_destination ~* ^https(.*)$ )
{
set $fixed_destination http$1;
}
proxy_pass http://127.00.0.1:8002/;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header Destination $fixed_destination;
client_max_body_size 32M;
client_body_buffer_size 512k;
proxy_connect_timeout 300;
proxy_send_timeout 300;
proxy_read_timeout 300;
proxy_buffer_size 4k;
proxy_buffers 4 32k;
proxy_busy_buffers_size 64k;
proxy_temp_file_write_size 64k;
}
}
server {
listen 80;
server_name domain3.io www.domain3.io;
access_log /var/log/nginx/domain3.io.access.log;
location / {
proxy_pass http://127.00.0.1:8003/;
}
}
server {
listen 80;
server_name domain4.com www.domain4.com;
access_log /var/log/nginx/domain4.com.access.log;
root /var/www/html/domain4.com;
index index.php index.html index.htm;
try_files $uri $uri/ /index.php?$query_string;
client_max_body_size 1G;
location ~ ^/sitemap/(.*)$ {
root /var/www/html/domain4.com/app/Sitemap/SitemapGz;
}
location /robots.txt {
alias /var/www/html/domain4.com/app/robots.txt;
}
location ~ ^/(images/|javascripts/|stylesheets/|fonts) {
root /var/www/html/domain4.com/app/assets;
access_log off;
expires max;
}
location ~ \.php$ {
fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
include /etc/nginx/fastcgi_params;
fastcgi_connect_timeout 300;
fastcgi_send_timeout 300;
fastcgi_read_timeout 300;
fastcgi_buffer_size 32k;
fastcgi_buffers 8 32k;
# cache
fastcgi_cache domain4.com;
fastcgi_cache_valid 200 60m;
fastcgi_cache_methods GET HEAD;
fastcgi_cache_key $scheme$request_method$host$request_uri;
fastcgi_ignore_headers Cache-Control Expires Set-Cookie;
}
}
自由-m
total used free shared buffers cached
Mem: 987 721 266 3 19 124
-/+ buffers/cache: 577 409
Swap: 255 133 122
ps aux --排序-rss | head
（用戶apache是nginx，因為我以前在這台機器上安裝了apache但現在停止了服務）
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
apache 24505 5.2 13.1 372208 132552 ? R 06:33 1:26 php-fpm: pool www
apache 24502 4.8 12.5 366332 126748 ? R 06:33 1:20 php-fpm: pool www
root 15490 0.2 11.6 1036476 117820 ? Ssl Sep30 1:30 node /var/www/html/sub.domain4.com/app/app.js
root 11488 0.0 3.3 905404 34336 ? Ssl Sep15 16:21 PM2 v0.14.7: God Daemon
apache 24866 7.0 3.0 265504 30448 ? S 06:56 0:18 php-fpm: pool www
apache 25247 7.3 2.6 262260 26976 ? S 06:58 0:10 php-fpm: pool www
apache 25449 7.1 2.3 259408 24260 ? S 06:58 0:07 php-fpm: pool www
mongod 3584 0.9 1.9 653472 19588 ? Sl Sep07 317:26 /usr/bin/mongod -f /etc/mongod.conf
root 2637 0.1 1.0 431044 11096 ? Sl Sep07 56:31 /usr/bin/python -Es /usr/bin/fail2ban-server -s /var/run/fail2ban/fail2ban.sock -p /var/run/fail2ban/fail2ban.pid -x -b
df-h
Filesystem Size Used Avail Use% Mounted on
/dev/xvda 24G 3.3G 20G 15% /
tmpfs 492M 108K 492M 1% /dev/shm
阿帕契已經停止了
sudo lsof -nPi | sudo lsof -nPi | grep ":80 (聽)"
nginx 15280 root 12u IPv4 91859687 0t0 TCP *:80 (LISTEN)
nginx 15282 nginx 12u IPv4 91859687 0t0 TCP *:80 (LISTEN)
服務httpd狀態
httpd is stopped
更新
升級到 2GB RAM 2 CPU 核心後，當我 ping 網域或使用http://www.webpagetest.org再次測試兩者都更快，但在報告中Target First Byte Time變得更高，這是什麼以及為什麼？
自由-m
total used free shared buffers cached
Mem: 1991 744 1246 12 78 229
-/+ buffers/cache: 436 1554
Swap: 255 0 255
ps aux --排序-rss |頭
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 2732 0.5 6.7 1069664 136836 ? Ssl 09:46 0:07 node /var/www/html/domain/app/app.js
mongod 2598 0.4 3.4 649400 69728 ? Sl 09:43 0:06 /usr/bin/mongod -f /etc/mongod.conf
root 2706 0.1 2.2 978924 45424 ? Ssl 09:45 0:02 PM2 v0.14.7: God Daemon
apache 5458 6.1 1.7 268540 35964 ? S 10:03 0:16 php-fpm: pool www
apache 5518 6.6 1.7 267752 35184 ? S 10:03 0:16 php-fpm: pool www
apache 5332 6.8 1.7 267604 35100 ? S 10:02 0:20 php-fpm: pool www
apache 5330 6.8 1.6 267420 34568 ? S 10:02 0:20 php-fpm: pool www
apache 5493 7.1 1.6 266028 33484 ? S 10:03 0:18 php-fpm: pool www
postgres 2557 0.3 0.9 324640 19812 ? S 09:43 0:04 /usr/pgsql-9.4/bin/postmaster -D /var/lib/pgsql/9.4/data
df-h
Filesystem Size Used Avail Use% Mounted on
/dev/xvda 24G 2.3G 21G 10% /
tmpfs 994M 108K 994M 1% /dev/shm
domain1.com - 108 ms First Byte Time, 108 ms Target First Byte Time
sub.domain2.com - 514 ms First Byte Time, Target First Byte Time
domain4.com -124 ms First Byte Time, 114 ms Target First Byte Time
答案1
我要做的第一件事就是將伺服器的 RAM 加倍。空閒空間非常少，這意味著 RAM 中能夠快取的資料非常少。這意味著幾乎所有磁碟讀取都必須到達磁碟，這會減慢讀取和寫入速度。