On 5/10/16 6:04 PM, Maxim Dounin wrote: > Hello! > > On Tue, May 10, 2016 at 12:26:59PM +0200, Artur wrote: > >> I'm currently working on nginx limits as a reverse proxy on a Debian box. >> My current setup is a nginx configured as a http/https web server (for >> static content) and a reverse proxy for node.js processes on the same >> server and in future on other Debian boxes. >> I was unable to see (while reading the documentation) real hard >> limitations for nginx in this setup excepting ephemeral ports exhaustion. >> It may be a concern as Node.js applications usually open a websocket >> that is connected as long as a user stays connected to the application. >> If I understood everything correctly it means that nginx in this setup >> will not be able to manage more than about 64k clients connections. >> Am I right ? What can be done if I would like to go over this 64k limit >> ? Could you please suggest a solution ? > > As long as you are using TCP/IP and have only one backend (ip + > port), and only one local address on nginx side, then you are > limited by the number of local ports nginx can use. Theoretical > limit is 64k, practical one is usually smaller - on Linux systems > it depends on net.ipv4.ip_local_port_range. > > Most natural solution is to add more backends. Under normal > conditions you will add more backend servers as your system will > grow, so you'll never hit the problem in the first place. If you > need to handle more than 64k connections to a single backend > server, consider listening on multiple addresses in your backend > application (e.g., listening on multiple ports). > > Other available solutions are: > > - use UNIX domain sockets (this works when you have everything on > a single host); > > - add more local addresses on nginx side and use proxy_bind to > balance users between these addresses. > + https://www.nginx.com/blog/overcoming-ephemeral-port-exhaustion-nginx-plus/
-- Maxim Konovalov _______________________________________________ nginx mailing list [email protected] http://mailman.nginx.org/mailman/listinfo/nginx
