Optimal configuration of nginx

Bobo roast duck 2020-11-13 04:57:00
optimal configuration nginx


Nginx There's a bit of a delay in the relevant content , Take advantage of today's free time for everyone to finish , In this article, I'll give you Nginx We often used in the work of the configuration to share with you , I hope it can help you .

Nginx Optimized configuration of

Global configuration

Options Set up
user root root; The default user is nobody, If nginx You need to visit something like root Class permission file , Will prompt 403 error , You can modify this by root To visit
worker_processes 2;
worker_cpu_affinity 01 10
nginx The default is not enabled to use multi-core cpu The configuration of . It needs to be increased by worker_cpu_affinity Configure parameters to make full use of multicore cpu,cpu It's task processing , When calculating the most time-consuming resources ,cpu The more nuclear use , The better the performance . explain :01 The first one is enabled CPU kernel ,10 Indicates that the second one is enabled CPU kernel worker_cpu_affinity 01 10; To start two processes , The first process corresponds to the first CPU kernel , The second process corresponds to the second CPU kernel .
error_log /var/log/nginx/error.log warn; Error log level
worker_rlimit_nofile 20480; change worker The maximum number of open files for a process , If it's not set , This value is the limit of the operating system , So set this value high , such nginx There will be no “too many open files” Problem. . After setting this , modify worker_connections When the value of , It can't exceed worker_rlimit_nofile This value of ( In fact, the core reason is the file opened by the program /socket The number of links exceeds the system set value )
use epoll; Use epoll Of I/O Model , You don't have to say that .{select/pool/kqueue/epool ; select、poll It's the standard working mode 、kquque、epoll It's a funny mode of work ,epoll It's for linux System .kqueue It's for bsd System (unix Derived system of )
worker_connections 20480; nginx The default number of concurrent connections is 1024, If the site is visited too much , You need to adjust this value , The larger the value, the greater the number of concurrency that can be supported . But the ultimate ceiling is CPU; In theory, each one nginx The maximum number of connections to the server is worker_processes*worker_connections
accept_mutex off; When a new connection arrives , If activated accept_mutex, So many Worker Will be processed in serial mode , One of them Worker Will be awakened , Other Worker Keep sleeping ; If it's not activated accept_mutex, So all Worker Will be awakened , But there's only one Worker Can get new connections , The rest of the Worker It will go back to sleep , This is it. 「 Startling questions 」. Suppose you have a hundred chickens , Now you have a grain of grain , So there are two ways to feed : You throw this grain right in the middle of the chicks , A hundred chickens came up to grab , In the end, only one chick can get it , The other ninety-nine chicks failed . It's like shutting down accept_mutex. You take the initiative to catch a chicken , Put the grain in its mouth , The other ninety-nine chickens didn't know about it , It's time to sleep . This is equivalent to activating accept_mutex. You can see in this scene , Activate accept_mutex It's better , Let's modify the scenario of the problem , I don't have only one grain of grain anymore , It's a basin of food , What do I do ? At this time, if we still take the initiative to catch chickens to plug food, it will be too inefficient , I don't know when and when a basin of grain can be fed , You can imagine the situation when dozens of chickens are waiting in line to feed . At this time, a better way is to sprinkle the grain directly into the chicken , Let them grab it by themselves , Although this may cause a certain degree of confusion , But the overall efficiency is undoubtedly greatly enhanced .
include /etc/nginx/mime.types; Here we use it to load the file extension and file type mapping table .nginx According to the mapping , Set up http Of the request response header Content-Type value . When you can't find it in the mapping table , Use nginx.conf in default-type Default value specified .
default_type application/octet-stream; Specifies that the default type is binary stream , That is, when the file type is not Define it in this way
sendfile on; Turn on efficient transmission mode
keepalive_timeout 60; http Connection timeout
include extra/*.conf; Manage through different profiles

extra/upstream.conf

upstream gupaoedu{

server 192.168.11.152:8080;
server 192.168.11.153:8080;
}

extra/vhost.conf

server {

listen 80;
server_name www.gupao.com
access_log off;
error_log off;
location / {

proxy_pass http://gupaoedu; # Select the corresponding load balancing configuration 
proxy_read_timeout 60; # And back end processor timeout Time consistency ; This instruction sets the read timeout with the proxy server . It determines nginx How long will it take to get a response to the request 
proxy_connect_timeout 60; # This command sets up with upstream server Connection timeout for , It is necessary to remember , This timeout cannot exceed 75 second 
proxy_send_timeout 60; This specification sets the sending request to upstream Server timeout time . Timeout is not set for the entire sending period , But twice write During operation . If after the timeout ,upstream No new data has been received ,nginx Will close the connection
proxy_set_header Host $host; # Set header information 
proxy_set_header X-Real-IP $remote_addr; # Set header information 
}
}
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