Forum: NGINX Re: Nginx capping at 320 requests per second

Hard to say.. I am not personally familiar with Tornado but I do know 
nginx with a very similar config with keepalive's at 5/10 seconds will 
do much more than that..

It's a very odd situation. I know it sounds dumb but do you have any 
errors in your 'dmesg' or in the nginx logs? Is it running out of 
buffered memory or system sockets?

Is reuse connections on in your sysctl's? I would double-check your 
sysctl config and personally I would run KeepAlive. This would ensure 
reusing connections and not opening a new connection for every request.

Everyone has their own opinion keepalive with attacks, large volumes of 
traffic, etc. However, we have found it to perform much better, less 
resources, and worse case - if you are having a bottleneck from 
something else then it would likely be more efficient.

-Kevin