What server side scripting language and HTTP server is best for handling most connections?

Example server: 1.7 GB RAM Amazon EC2 Instance. Task to perform: Query an Amazon RDS instance, fetch the results and deliver them in JSON format. (Simple) For this scenario, which server side programming language and http server would be the best at handling and responding to requests? Which combo would be able to handle the most concurrent load? Which would use the ram most efficiently? Details: If the resources are limited to run on, for a web service (which is to query a MySQL DB server, fetch results and deliver them as xml or json), which web server and server side language would be the best at handling the most amount of connections and responding to the HTTP requests?
Answer:

Erlang, webmachine, mochiweb, with a HAProxy load balancer and probably nginx serving static resources. Flame on.

Andrew Ledvina at Quora Visit the source

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Other answers

Checkout some of these python framework benchmarks - http://nichol.as/benchmark-of-python-web-servers. Many of these frameworks are non blocking and can handle tens of thousands of requests at a time.

Adam Gotterer

An /yaws stack benchmarks impressively against traditional servers, at least for static content.

Toby Thain

Write it in C using kqueue on FreeBSD. Also, premature optimization is the root of all evil. Write it in whatever is easiest for your team.

Pete Hunt

I realise this isn't entirely relevant, but there are some benchmarks here on some Node.js and PHP frameworks http://www.piprime.fr/1541/benchmark-of-some-popular-web-frameworks/

Jamie Mason

node.js and nginx COMMENCE THE FLAMEWAR

Tom MacWright

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