MPE/iX 5.5 Operating System Limits

Item Limit Description Resource Table
1 16384 Timer Entries Timer Table
(1) Timer table
Timer entries are used throughout the system to manage events. Jobs, sessions, file
system, i/o and networking subsystems all generate timer requests. Additionally, users
can utilize intrinsics such as FREAD for timed reads or PAUSE to request a timer entry.
The Timer Globals (KSO 80) contains a pointer to the timer table. The maximum number
of timer entries is 16384.
Memory management:
Item Limit Description Resource Table
1 13104 MIB Entries in the MIB Table MIB
2 32768 IO Notification Entries NM IO Notify Object
3 12288 IO Request Entries MM IO Request Object
4 55000 Entries in Process Locality List MM LL Object
5 523600 Entries in VS Locality List Table MM VS LL Header
(1) Mib - KSO204
The MIB table is a MEMORY Management data structuure that contains one entry for
each Memory Information Block on the system. A MIB is a global data structure used by
the Memory Manager, the Virtual Space Management, and the I/O subsystem to handle
requests for I/O. MIBs are allocated by VSM in response to Memory Manager requests to
execute an I/O. Each of the three subsystems contains their own areas of the MIB for
which they are responsible. MIB entries will be created at I/O request time and will be
released when the I/O has completed. The MIB table contains 13104 MIB entries.