[Sunhelp] ptys

[Duffin, Keith (CAP, GEFA)]

Take a look at your /etc/system file.  If no entry exists, you have 48.
 
FAQ exerpt:
 
    Edit /etc/system and add the following line:
 
        * System V pseudo terminals
 
        set pt_cnt = <num>
 
    Halt the system and boot -r.
 
    You can essentially have as many as you like, but you'll probably
run into some other limit somewhere.  More than 3000 are supported.
Solaris 2.6 and earlier have telnet/rlogin daemons that do not     support
more than 3844 sessions each.  That restriction is lifted     in Solaris 7.
 
    Some die-hard system administrator myths as well as some Sun
documentation claim that you have to increased "sad_cnt", "sadcnt"     or
"nautopush" when adding ptys.  There is no truth in this. 
 
    In the unlikely event that you run out of BSD-style ptys,
    you can increase them as well.  The maximum here is currently     176
for pty[p-z][0-9a-f].  This is somewhat less that the BSD     maximum of 256
limited by 8 bit device minor numbers.
 
    BSD ttys are awkward to use and all programs I found support SYSV
ptys without trouble.
 
        * You don't need this.  Increasing this value too much usually
* just wastes memory.
        * BSD applications never support more than 256 ptys.
        * Solaris 2.x supports no more than 176 BSD ptys.
 
        set npty = <num>
 
    But you're not there yet, you also need to edit /etc/iu.ap and
substitute the new value of "npty-1" for the "47" on the following     line,
in case you do increase the number of BSD style ptys.
 
                ptsl    0      47      ldterm ttcompat
 
 
    Halt the system and boot -r.
 
    --- end of excerpt from the FAQ

Keith Duffin
UNIX SA/DBA/C etc...
ORA Consultants/GE Financial Services			
Tel:  (804)782-2744


-----Original Message-----
From: McIntire, John [mailto:john_mcintire at unitrode.com]
Sent: Tuesday, June 08, 1999 7:57 AM
To: 'Sun Help'
Subject: [Sunhelp] ptys


I got system on SunOS 4.1.4 2 sun4m which is running out of ptys. Being
still new to Sun how do you tell what it is set for and what is the max it
can be set for?  

Thanks in advance

John McIntire
Senior Systems Analyst
Unitrode Corporation
7 Continental Blvd	
Merrimack, NH 03054			
Tel:  (603)429-6227
Fax: (603)429-6085



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