From: matz@... (Yukihiro Matsumoto)
Date: 2002-07-11T09:37:44+09:00
Subject: Re: Bug in socket code - high number of simul. conns causes segfault

Hi,

In message "Re: Bug in socket code - high number of simul. conns causes segfault"
    on 02/07/11, Paul Brannan <pbrannan@atdesk.com> writes:

|Since Ruby uses user-level threads and calls select() for you with all
|of the file descriptors that all of the threads are waiting on, there's
|not really any way you can get more than FD_SETSIZE file descriptors
|with Ruby the way it is, no matter how many threads you use.  It's still
|odd that the segfault occurs after 500 connections; it should happen
|after 1000.  It's almost as if Ruby is using 2 file descriptors per
|connection, though I'm not sure why it would do that.

Socket comsumes two file descriptors per connection, to achieve
bi-directionl "stdio" connection.

|One solution, if you really need this many file descriptors, is to
|increase FD_SETSIZE.  An alternative might be to modify the interpreter
|to use poll() or /dev/poll instead of select(), on systems where they
|are available.  Both of these are capable of handling more than 1000
|file descriptors.

Interesting idea.

							matz.