topic The system has no more ptys in Operating System - HP-UX

The system has no more ptys

Baird W Cowan — Thu, 30 Aug 2001 20:35:12 GMT

I am running a expect script on a HP9000 10.20 ux and the kernel settings are as follows:
npty 800
nstrpty 60
nswapdev 25

The system has no more ptys. Ask your system administrator to create more.
while executing
"spawn /bin/ksh"

What should I do.

Baird Cowan
bcowan@edfund.org

Re: The system has no more ptys

John Poff — Thu, 30 Aug 2001 20:37:51 GMT

Hi,

We ran into the same problem last week on a new system. Do

insf -e

and it will create the pty files for you.

JP

Re: The system has no more ptys

Sridhar Bhaskarla — Thu, 30 Aug 2001 21:24:10 GMT

Try increasing the nstrpty value to 100 and see.

-Sri

Re: The system has no more ptys

Sanjay_6 — Thu, 30 Aug 2001 21:33:32 GMT

Hi,

Like sridhar has said earliar, increase nstrpty to 100 or while you are at it, double it to 120. This should work

Thanks

Re: The system has no more ptys

Baird W Cowan — Fri, 31 Aug 2001 13:06:04 GMT

Ok I have tried this thru sam, but it states the following: The paramter modifications you have made haave resulted in at least one paramter evaluating to a vaule which is greater than it's maximum allowable value. Parameter "nswapdev", currently set to "32" has evaluated toto "32", which is greater than its maximum allowable value of "25"

Re: The system has no more ptys

Rita C Workman — Fri, 31 Aug 2001 13:48:45 GMT

Well, as my own preference, on my 10.2 boxes I set mine as this:

npty 800
nstrpty 800

The nswapdev sets how many swap device files you can have...so is not associated with the pty parms. For myself I never set this higher than 10 (and then I keep all my swap working in memory..) But that's up to you...the max is 25 here.

It would probably be a good idea as was stated in an earlier post to rebuild your special files.
***********
Here is a thread that I keep bookmarked that explains the different parms:
http://docs.hp.com//hpux/onlinedocs/os/KCparams.OverviewAll.html

Hope this helps,
Rita

Re: The system has no more ptys

Deshpande Prashant — Fri, 31 Aug 2001 14:34:50 GMT

HI
Change the "nswapdev" parameter to accept value than formula. This this value can be less than 25, and change "nstrpty" to a higher value as suggested in earlier posts.

Thanks.
Prashant.