worker_connections and worker_rlimit_nofile

[Maxim Dounin]

Hello!

On Mon, Mar 01, 2010 at 03:34:03PM +0530, Arvind Jayaprakash wrote:

> On Feb 04, Max wrote:
> >I used to use worker_connections but wen I use it, I got a lot of too many
> >open files in the error log.
> >
> >Now, I changed it to worker_rlimit_nofile 10240 and the problem has been
> >solved (I google it and found the solution).
> >
> >I just want to ask, what's the differences between worker_connections and
> >worker_rlimit_nofile? Why worker_connections will casue too many open files
> >problem? Thanks.
> 
> worker_connections specifies how many network connections a worker is
> allowed to maintain. worker_rlimit_nofile specifies how many open file
> handles are allowed per worker. Since all tcp connections are file
> handles (descriptors) on *nix systems, worker_rlimit_nofile must be
> greater than worker_connections.

Not really.  Directive worker_rlimit_nofile doesn't specify 
"how many", it is operation system limit which does.  Directive 
worker_rlimit_nofile just allows an quick-and-dirty way to enlarge 
this limit if it's not enough.

Maxim Dounin