maximum number of file descriptors

[pablo platt]

Hi

I'm using nginx for long polling requests.
Each user will have at least one hanging request in addition to requesting
static files when needed.
I understand that each connection needs a file descriptor.
The default limit on ubuntu is 1024.
How can I increase this limit?
Do I need to change something on ubuntu or just in nginx config?
Does worker_rlimit_nofile what I'm looking for or does it only set the limit
per worker and I'll still hit the master process limit?
http://wiki.nginx.org/NginxHttpMainModule#worker_rlimit_nofile

Thanks
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