MPE/iX 5.5 Operating System Limits

the :ALTGROUP or :ALTACCT command) then the number of output spoolfiles may be
less than 9900. In addition the total amount of disc space available on your system may
limit the number of output spoolfiles.
(3) Spooler info table - KSO285
There is one Spooler Information Table (SPIT) entry allocated for each active spooler
process (input or output).
The SPIT limits the number of spoolable devices to the maximum number of logical
devices allowed on the system. For release 5.5, this is 4679. Note that the SPIT should
never grow this large, as this number includes disks, terminals, and tape drives, none of
which are spoolable (except tapes, which can be spooled for input).
The number was increased from 5.5 (fixed) so that large configurations on consolidated
systems do not encounter it as a limit, nor does it require periodic maintenance to keep
increasing this number as systems grow larger.
Volume management:
Item Limit Description Resource Table
1 255 Mounted Disc Ldevs Mounted Volume Table
2 255 Mounted Volume Sets Mounted Volume Set Table
3 127 Mirrored Pair Mirrored Volumes
1 127 Mirrored Volume Sets Mounted Volume Table
(1) Mounted vol table - KSO223
The MVT is a permanent data structure in the Volume Management. It is created
INSTALL time, and will be mapped in at START time. The MVT will be re-created each
time the system is booted. There is one entry in the MVT per mounted volume on the
system. A new entry is allocated in the MVT when a volume is initialized or mounted on
the system. By default, the first entry is for system master volume. The max number of
entries is 255, which means that the system can theoricaly support 255 volumes.