Ini adalah nginx.conf(konfigurasi saya telah saya perbarui untuk memastikan bahwa tidak ada PHP yang terlibat atau hambatan lainnya):
user nginx;
worker_processes 4;
worker_rlimit_nofile 10240;
pid /var/run/nginx.pid;
events
{
worker_connections 1024;
}
http
{
include /etc/nginx/mime.types;
error_log /var/www/log/nginx_errors.log warn;
port_in_redirect off;
server_tokens off;
sendfile on;
gzip on;
client_max_body_size 200M;
map $scheme $php_https { default off; https on; }
index index.php;
client_body_timeout 60;
client_header_timeout 60;
keepalive_timeout 60 60;
send_timeout 60;
server
{
server_name dev.anuary.com;
root "/var/www/virtualhosts/dev.anuary.com";
}
}
Saya menggunakan http://blitz.io/play untuk menguji server saya (saya membeli 10 000 paket koneksi bersamaan). Dalam 30 detik berjalan, saya mendapatkan 964hit dan 5,587 timeouts. Waktu tunggu pertama terjadi pada 40,77 detik saat pengujian ketika jumlah pengguna bersamaan adalah 200.
Selama pengujian, beban server adalah ( topkeluaran):
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 20225 nginx 20 0 48140 6248 1672 S 16.0 0.0 0:21.68 nginx
1 root 20 0 19112 1444 1180 S 0.0 0.0 0:02.37 init
2 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kthreadd
3 root RT 0 0 0 0 S 0.0 0.0 0:00.03 migration/0
Oleh karena itu bukan masalah sumber daya server. Lalu apa itu?
UPDATE 2011 12 09 GMT 17:36.
Sejauh ini saya melakukan perubahan berikut untuk memastikan bahwa bottleneck bukan TCP / IP. Ditambahkan ke /etc/sysctl.conf:
# These ensure that TIME_WAIT ports either get reused or closed fast.
net.ipv4.tcp_fin_timeout = 1
net.ipv4.tcp_tw_recycle = 1
# TCP memory
net.core.rmem_max = 16777216
net.core.rmem_default = 16777216
net.core.netdev_max_backlog = 262144
net.core.somaxconn = 4096
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_max_orphans = 262144
net.ipv4.tcp_max_syn_backlog = 262144
net.ipv4.tcp_synack_retries = 2
net.ipv4.tcp_syn_retries = 2
Beberapa info debug lainnya:
[root@server node]# ulimit -a
core file size (blocks, -c) 0
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 0
file size (blocks, -f) unlimited
pending signals (-i) 126767
max locked memory (kbytes, -l) 64
max memory size (kbytes, -m) unlimited
open files (-n) 1024
pipe size (512 bytes, -p) 8
POSIX message queues (bytes, -q) 819200
real-time priority (-r) 0
stack size (kbytes, -s) 10240
cpu time (seconds, -t) unlimited
max user processes (-u) 1024
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
NB Itu worker_rlimit_nofilediatur ke 10240nginx config.
UPDATE 2011 12 09 GMT 19:02.
Sepertinya semakin banyak perubahan yang saya lakukan, semakin buruk, tetapi di sini file konfigurasi baru.
user nginx;
worker_processes 4;
worker_rlimit_nofile 10240;
pid /var/run/nginx.pid;
events
{
worker_connections 2048;
#1,353 hits, 2,751 timeouts, 72 errors - Bummer. Try again?
#1,408 hits, 2,727 timeouts - Maybe you should increase the timeout?
}
http
{
include /etc/nginx/mime.types;
error_log /var/www/log/nginx_errors.log warn;
# http://blog.martinfjordvald.com/2011/04/optimizing-nginx-for-high-traffic-loads/
access_log off;
open_file_cache max=1000;
open_file_cache_valid 30s;
client_body_buffer_size 10M;
client_max_body_size 200M;
proxy_buffers 256 4k;
fastcgi_buffers 256 4k;
keepalive_timeout 15 15;
client_body_timeout 60;
client_header_timeout 60;
send_timeout 60;
port_in_redirect off;
server_tokens off;
sendfile on;
gzip on;
gzip_buffers 256 4k;
gzip_comp_level 5;
gzip_disable "msie6";
map $scheme $php_https { default off; https on; }
index index.php;
server
{
server_name ~^www\.(?P<domain>.+);
rewrite ^ $scheme://$domain$request_uri? permanent;
}
include /etc/nginx/conf.d/virtual.conf;
}
UPDATE 2011 12 11 GMT 20:11.
Ini adalah output netstat -ntlaselama tes.
https://gist.github.com/d74750cceba4d08668ea
UPDATE 2011 12 12 GMT 10:54.
Hanya untuk memperjelas, iptables(firewall) tidak aktif saat pengujian.
UPDATE 2011 12 12 GMT 22:47.
Ini adalah sysctl -p | grep memdump.
net.ipv4.ip_forward = 0
net.ipv4.conf.default.rp_filter = 1
net.ipv4.conf.default.accept_source_route = 0
kernel.sysrq = 0
kernel.core_uses_pid = 1
net.ipv4.tcp_syncookies = 1
kernel.msgmnb = 65536
kernel.msgmax = 65536
kernel.shmmax = 68719476736
kernel.shmall = 4294967296
net.ipv4.tcp_fin_timeout = 30
net.ipv4.tcp_keepalive_time = 30
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_mem = 8388608 8388608 8388608
net.ipv4.tcp_rmem = 4096 87380 8388608
net.ipv4.tcp_wmem = 4096 65536 8388608
net.ipv4.route.flush = 1
net.ipv4.ip_local_port_range = 1024 65000
net.core.rmem_max = 16777216
net.core.rmem_default = 16777216
net.core.wmem_max = 8388608
net.core.wmem_default = 65536
net.core.netdev_max_backlog = 262144
net.core.somaxconn = 4096
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_max_orphans = 262144
net.ipv4.tcp_max_syn_backlog = 262144
net.ipv4.tcp_synack_retries = 2
net.ipv4.tcp_syn_retries = 2
UPDATE 2011 12 12 GMT 22:49
Saya menggunakan blitz.iountuk menjalankan semua tes. URL yang saya uji adalah http://dev.anuary.com/test.txt , menggunakan perintah berikut:--region ireland --pattern 200-250:30 -T 1000 http://dev.anuary.com/test.txt
UPDATE 2011 12 13 GMT 13:33
nginxbatas pengguna (setel /etc/security/limits.conf).
nginx hard nofile 40000
nginx soft nofile 40000
worker_processesmenjadi 4.