topic Re: nstrpty in Operating System - HP-UX

nstrpty

BrianDoyle — Mon, 11 Jan 2010 10:15:32 GMT

Hi

My nstrpty kernel parameter is using all 60 of its pty sessions which is the default value.
I've increased the value and awaiting a reboot later.

Is it possible to see what is using these sessions?

thanks

Re: nstrpty

Dennis Handly — Mon, 11 Jan 2010 11:36:37 GMT

What OS version are you on?
You can look at who owns these devices with ll(1).
You can use lsof to see what process owns each.

Re: nstrpty

likid0 — Mon, 11 Jan 2010 11:46:54 GMT

Take a look at:
http://forums13.itrc.hp.com/service/forums/questionanswer.do?admit=109447627+1263209545055+28353475&threadId=1284633

if you are on 11.23 or 11.31, you can use kcusage to see the total usage, you won't get per user info.

Re: nstrpty

Viktor Balogh — Tue, 12 Jan 2010 15:52:00 GMT

>I've increased the value and awaiting a reboot later.

you don't need to wait for the reboot, you can increase the pty device files with insf. And the used pty devices can be listed with a tool called 'tioshow' - you can call the HP Response Center to get a copy of it. Or use lsof...

Re: nstrpty

Viktor Balogh — Tue, 12 Jan 2010 15:53:51 GMT

if you only want an overview how much pty devices are in use, you can take a look in glance - press 't' for system tables

System Table Available Used Utilization High(%)
--------------------------------------------------------------------------------
Proc Table (nproc) 14208 1954 14 14
File Table (nfile) 46522 13157 28 28
Shared Mem Table (shmmni) 216 29 13 13
Message Table (msgmni) 12286 29 0 0
Semaphore Table (semmni) 6142 94 2 2
File Locks (nflocks) 4720 160 3 3
Pseudo Terminals (npty) 60 1 2 2
Buffer Headers (nbuf) na 482970 na na

Re: nstrpty

Viktor Balogh — Tue, 12 Jan 2010 15:57:27 GMT

sorry, I misunderstood the situation, in order for the new npty value to take effect you need a reboot since it isn't a dynamic kernel parameter.

Re: nstrpty

BrianDoyle — Tue, 12 Jan 2010 16:03:01 GMT

I contacted HP and got the tioshow tool. This shows the orphaned sessions.