Thanks, it worked! Best regards, Harris
On Mon, Nov 9, 2020 at 4:14 PM Christopher Faulet <[email protected]> wrote: > Le 09/11/2020 à 15:38, Christopher Faulet a écrit : > > Le 06/11/2020 à 19:56, Harris Kaufmann a écrit : > >> Hi everyone, > >> > >> I wanted to try the FastCGI multiplexing feature, but whatever I do > HAProxy > >> never sends multiple requests simultaneously over the same backend > connection. > >> This is my configuration: > >> > >> > ------------------------------------------------------------------------------ > >> > >> defaults > >> mode http > >> timeout connect 5000ms > >> timeout client 50000ms > >> timeout server 50000ms > >> > >> > >> backend fastcgi > >> server server0 127.0.0.1:9002 <http://127.0.0.1:9002> proto fcgi > maxconn 1 > >> use-fcgi-app fcgi-app > >> > >> fcgi-app fcgi-app > >> docroot / > >> option mpxs-conns > >> option max-reqs 20 > >> no option get-values > >> > >> frontend web > >> bind *:8080 > >> default_backend fastcgi > >> > >> > ------------------------------------------------------------------------------ > >> > >> When I send multiple HTTP requests that overlap, Haproxy just executes > them > >> serially with new backend connections for each request (because of > maxconn) and > >> most of them time out. Is my configuration wrong? Did I misunderstand > this feature? > >> > > > > You must first be sure you FCGI application support the connection > multiplexing. > > For instance, php-fpm is unable to do so. Then, the "maxconn" on a > server line > > in HTTP mode will limit the number of concurrent requests. Not the > number of > > concurrent connections. From the doc : > > > > maxconn <maxconn> > > > > [...] > > In HTTP mode this parameter limits the number of concurrent requests > instead > > of the number of connections. Multiple requests might be multiplexed > over a > > single TCP connection to the server. As an example if you specify a > maxconn > > of 50 you might see between 1 and 50 actual server connections, but > no more > > than 50 concurrent requests. > > > > Thus, you should set maxconn to 20 (same than max-reqs FCGI option). > But, this > > way you should be prepared to open at most 20 connections. > > Note also, since the 2.3, if you use the http-reuse safe method (the > default), > the multiplexing is only performed for streams of the same session. It > means, in > safe mode, there is no sharing between several clients. > > -- > Christopher Faulet >
