MPE/iX 5.5 Operating System Limits

(1) Pcb DST - DST003
There is one entry in the PCB (Process Control Block) table for every process on the
system. The maximum number of entries in the PCB is 5460.
The PCB indirectly limits the number of jobs/sessions (remote or local) you can have on
your system. For more information on how to calculate the maximum number of
jobs/session see the Job/Session section of this document.
Since 4.0, the maximum number of process on the system is no longer a hard coded
constant but it is calculated at system intitialization time is a function of the memory size.
The following table gives you the maximum number of process on the system depending
on the available main memory.
Main Memory Max # of Processes
< 24 MB 200
<= 24 MB 1000
<= 32 MB > 32MB 8190
Spooler:
Item Limit Description Resource Table
1 ~9900 Spool Files, Input Input Spool File Dir
2 ~9900 Spool Files, Linked Output Output Spool File Dir
3 4679 Spooler Processes Spooler Info Table
(1) Input spool file dir - KSO287
There is an entry in the Input SPFDIR table for each input spoolfile on the system. All
input spoolfiles reside in the group IN.HPSPOOL, and have an entry in the Input
SPFDIR.