Date: Thu, 20 Nov 2003 11:41:12 -0500 From: Ken Smith <kensmith@cse.Buffalo.EDU> To: Robert Watson <rwatson@freebsd.org> Cc: Len Sassaman <rabbi@anonymizer.com> Subject: Re: Help request: problems with a 5.1 server and large numbers of ssh users. Message-ID: <20031120164112.GF29560@electra.cse.Buffalo.EDU> In-Reply-To: <Pine.NEB.3.96L.1031120104909.19991E-100000@fledge.watson.org> References: <0C8643E8-1B1A-11D8-B160-000A959E7C72@anonymizer.com> <Pine.NEB.3.96L.1031120104909.19991E-100000@fledge.watson.org>
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On Thu, Nov 20, 2003 at 10:56:08AM -0500, Robert Watson wrote:
> Hmm. Well, it certainly sounds like a resource limit to me, especially if
> it's a nice round number like "150" or "300".
One possibility might be running out of pseudo-terminals to support
the login sessions. pty's are created as needed I think, and the
code that handles it is in sys/kern/tty_pty.c. The limits on it
appear to be 256 ptys:
/*
* This function creates and initializes a pts/ptc pair
*
* pts == /dev/tty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv]
* ptc == /dev/pty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv]
*
* XXX: define and add mapping of upper minor bits to allow more
* than 256 ptys.
*/
I don't know if simply changing the :
static char *names = "pqrsPQRS";
to something longer is all that would be required or if there are
other factors involved.
--
Ken Smith
- From there to here, from here to | kensmith@cse.buffalo.edu
there, funny things are everywhere. |
- Theodore Geisel |
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