MPE/iX 5.5 Operating System Limits

N = The average number of SOMs per Library. The default set by the
MPE/iX Link Editor is 500.
SUMMARY OF VALUES FOR THE PDD:
- Size of the PDD header = 96 bytes
- Size of the PDD hash table = 16,000 bytes
- Size of an PDD export data entry = 84 bytes
- Size of an PDD import data entry = 24 bytes
The size requirement for PDD is given as follows:
PDD FORMULA
PDD size = PDD header + PDD hash table + E *
(PDD export data entry size + PDD import data entry
size * I)
SYMBOLS
-------
E = The number of shared global data exports
I = The average number of data imports per data export
Considering both the PFL chain and the PDD, each symbol can be of any value--subject
to the limits above.
PFL LIMIT FORMULA
PFL chain length + PDD size <= 20,971,520
The primary limit on the number of executable files that can be opened for a process is
the system limit imposed by the Loaded File Table (LFT). (See that section in this
document.)
We can use the limits imposed by the LFT to calculate the number of libraries a process
can have opened.
LFT LIMIT FORMULA
(P * (40 + 44) + (L * (40 + (44 * N)) <= 2,003,928
84 + L * (40 + 22,000) <= 2,003,928
L <= 90
L = The number of unique library files
N = Maximum number of SOMs in the library. The default is 500.