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Is NGINX multithreaded?
Nginx uses only asynchronous I/O, which makes blocking a non-issue. The only reason nginx uses multiple processes, is to make full use of multi-core, multi-CPU and hyper-threading systems. Even with SMP support, the kernel cannot schedule a single thread of execution over multiple CPUs.
How is NGINX implemented?
Each NGINX worker process is initialized with the NGINX configuration and is provided with a set of listen sockets by the master process. Most web servers that perform the same functions as NGINX use a similar state machine – the difference lies in the implementation.
Does NGINX queue request?
queue (NGINX Plus) – Creates a queue in which requests are placed when all the available servers in the upstream group have reached their max_conns limit. This directive sets the maximum number of requests in the queue and, optionally, the maximum time they wait (60 seconds by default) before an error is returned.
How many connections can NGINX handle?
With NGINX, every open connection equates to at least one or sometimes two open files. By setting the maximum number of connections to 4096 , we are essentially defining that every worker can open up to 4096 files.
How many requests NGINX can handle?
Generally, properly configured nginx can handle up to 400K to 500K requests per second (clustered), most what i saw is 50K to 80K (non-clustered) requests per second and 30% CPU load, course, this was 2 x Intel Xeon with HyperThreading enabled, but it can work without problem on slower machines.
What’s the purpose of NGINX?
NGINX is open source software for web serving, reverse proxying, caching, load balancing, media streaming, and more. It started out as a web server designed for maximum performance and stability.
How does the asynchronous approach work in Nginx?
It’s well known that NGINX uses an asynchronous, event‑driven approach to handling connections. This means that instead of creating another dedicated process or thread for each request (like servers with a traditional architecture), it handles multiple connections and requests in one worker process.
How is a request processed in Nginx server?
If the server name is not found, the request will be processed by the default server. For example, a request for www.example.com received on the 192.168.1.1:80 port will be handled by the default server of the 192.168.1.1:80 port, i.e., by the first server, since there is no www.example.com defined for this port.
How does the thread pool work in Nginx?
This means that instead of creating another dedicated process or thread for each request (like servers with a traditional architecture), it handles multiple connections and requests in one worker process. To achieve this, NGINX works with sockets in a non‑blocking mode and uses efficient methods such as epoll and kqueue.
How does the default server work in Nginx?
If its value does not match any server name, or the request does not contain this header field at all, then nginx will route the request to the default server for this port. In the configuration above, the default server is the first one — which is nginx’s standard default behaviour.