In the September 1994 issue of Interact on page 43, I provided an example of
how to change the configured
session limit with out rebooting. This would of course NOT change the
hardware maximum which one can see using the SHOWVAR HPUSERLIMIT command.
This modification is only temporary and will not survice a reboot. As
allways, this example is provided to show what is possible. Do not attempt
this on a production system unless you are completely comfortable with your
DEBUG skills.

The following example changes the max session limit from 60 to 500!

debug
DEBUG/iX C.05.08

HPDEBUG Intrinsic at: a.00a2f698 hxdebug+$e4
$1 ($30) nmdebug > use datinit.dat.telesup
Type "macstart" to load Macros & Symbols.

$b ($30) nmdebug > macstart

Welcome to the DAT Macro facility.

RELEASE: C.55.00   MPE/iX HP31900 C.05.08   USER VERSION: C.55.00

Please choose which macros & symbol files you wish to load.
Multiple choices may be entered all at once (default <cr> is all).
Valid input examples: "1 2 3" or "OS DB" or "1,DC" or <cr> or "ALL".

   1)  OS macros & symbols
   2)  Data Comm macros & symbols
   3)  Data Base Core & Turbo Image macros & symbols
   8)  User macros & symbols
   9)  Do not load any macros

Enter your selection now: 1

OS Symbol file SYMOS.OSC05.TELESUP is now open.
Next line maps VAMOS.OSC05.TELESUP
1  VAMOS.OSC05.TELESUP   a5.0 Bytes = 1f90

OS Macros restored from file MOS.OSC05.TELESUP.
OS DAT MACROS  HP30357 C.05.03    Copyright Hewlett-Packard Co. 1987

$117 ($30) nmdebug > var jp =
symval(!hp__system_globals_ptr,'system_globals_typ
e.jmat_ptr')
$118 ($30) nmdebug  wl jp
$14d.24c
$119 ($30) nmdebug > fv jp,'jmat_header_type'

CRUNCHED RECORD
   CURRENT_SIZE        : 574
   VMOUNT_INFO         : 0
   ENTRY_SIZE          : 98
   ENTRY_OFFSET        : 1
   SCHED_HEAD_OFFSET   : 0
   SCHED_TAIL_OFFSET   : 0
   SESSION_TY          : 1
   SESSION_NUMBER      : 2af
   JMAT_REPLACE_1      : 0
   JOB_TY              : 2
   JOB_NUMBER          : 2c7
   JMAT_REPLACE_2      : 0
   LOG_OFF             : FALSE
   JOB_SECURITY        : 3
   RESOURCE_FLAG       : FALSE
   LDEV_FLAG           : FALSE
   DEGRADE_MODE        : FALSE
   USER_CI             : FALSE
   RESERVED_BITS       : 0
   SESSION_FENCE       : 0
   JOB_FENCE           : 0
   SESSION_LIMIT       : 3c
   SESSION_COUNT       : 5
   JOB_LIMIT           : 5
   JOB_COUNT           : 3
   JMAT_SCHEDHEAD      : 55d
   DEGRADE_RULERS      : [ ]
   WORK_AREA_BITS      : 0
   JOB_PASSEXEMPT      : [ ]
   JOB_NUMBER_BASE     : 1
   JOB_NUMBER_MAX      : 0
   SESSION_NUMBER_BASE : 1
   SESSION_NUMBER_MAX  : 0
   WORK_AREA           :
      [ 1  ]: 0
      [ 2  ]: 0
      [ 3  ]: 0
      [ 4  ]: 0
      [ 5  ]: 0
      [ 6  ]: 0
      [ 7  ]: 0
      [ 8  ]: 0
      [ 9  ]: 0
      [ a  ]: 0
      [ b  ]: 0
      [ c  ]: 0
      [ d  ]: 0
      [ e  ]: 0
      [ f  ]: 0
      [ 10 ]: 0
      [ 11 ]: 0
      [ 12 ]: 0
      [ 13 ]: 0
      [ 14 ]: 0
      [ 15 ]: 0
      [ 16 ]: 0
      [ 17 ]: 0
      [ 18 ]: 0
      [ 19 ]: 0
      [ 1a ]: 0
      [ 1b ]: 0
      [ 1c ]: 0
      [ 1d ]: 0
      [ 1e ]: 0
      [ 1f ]: 0
      [ 20 ]: 0
      [ 21 ]: 0
      [ 22 ]: 0
      [ 23 ]: 0
      [ 24 ]: 0
      [ 25 ]: 0
      [ 26 ]: 0
      [ 27 ]: 0
      [ 28 ]: 0
      [ 29 ]: 0
      [ 2a ]: 0
      [ 2b ]: 0
      [ 2c ]: 0
      [ 2d ]: 0
      [ 2e ]: 0
      [ 2f ]: 0
      [ 30 ]: 0
      [ 31 ]: 0
      [ 32 ]: 0
      [ 33 ]: 0
      [ 34 ]: 0
      [ 35 ]: 0
      [ 36 ]: 0
      [ 37 ]: 0
      [ 38 ]: 0
END


$11a ($30) nmdebug >dv jp+16,1
VIRT $14d.260      $ 003c0005
$11b ($30) nmdebug > mv jp+16,1
VIRT $14d.260      = ".<.."  $3c0005 := $01f40005 <<only change the first
two bytes>>
$11c ($30) nmdebug > e
<SEVEN> SUPERDEX.SYS