Max no of parallel SSH sessions with Cygwin SSHD

[Corinna Vinschen]

On Feb 24 16:47, Girish Sadhani wrote:
> Hi Corinna,
> 
> the following error was logged in the sshd.log :
> 
> 2 [main] sshd 7140 d:\Sygwin\usr\sbin\sshd.exe: *** fatal error -
> could not load user32, Win32 error 1114
> 
> I tried to google this but could not make too much sense of the error.
> Its supposed to be a failure of a dll initialization.
> 
> And this occurs only after the sessions limit mentioned earlier are reached.

Yes.  See the URL I sent in my first reply.

> 
> On Wed, Feb 24, 2010 at 4:18 PM, Corinna Vinschen
> <corinna-cygwin@cygwin.com> wrote:
> > On Feb 24 10:02, Girish Sadhani wrote:
> >> Hello All,
> >>
> >> I am trying to use Cygwin SSHD in my project. I have defined a
> >> subsystem under SSHD which gets accessed by the client.
> >>
> >> Each subsystem invocation spawns 3 processes (1 sshd + 1sh + 1 tclsh).
> >>
> >> I have observed that on WinXP only 22 parallel sessions are possible
> >> whereas on a Win2k3 server 48 parallel sessions are possible. Both are
> >> of a similar hardware configuration (3Ghz CPU, 2GB RAM). After which
> >> it seems like some resource allocation limit is reached, though there
> >> is a lot more Memory and CPU available. I have tried increasing the
> >> heap allocation but it does not help the situation.
> >>
> >> 1. My question is that why is there a difference between the 2 OSs ?
> >> 2. Does XP have resource allocation lower limits than win2k3 server ?
> >> 3. How can this be overcome ? (some OS settings ..)
> >
> > I have no idea if that helps, but it could be related to the Windows
> > subsystem settings in the registry There are three values in an argument
> > called SharedSection which define default heap sizes. Â The third one is
> > the value which would influence a sshd started as service. Â See
> > http://support.microsoft.com/kb/184802


Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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