Guardian Procedure Calls Reference Manual (G06.25+)

Guardian Procedure Calls Reference Manual—522629-013
J-1
J System Limits
This appendix presents a series of tables that summarize the architectural and
programmatic limits that apply on NonStop servers. For SQL/MP limits, refer to the
“Limits” entry in the
SQL/MP Reference Manual. For TMF limits, refer to the TMF
Configuration and Planning Guide. For the locations of other published limits, refer to
Table J-7
on page J-9
Table J-1. System-Level Limits (page 1 of 2)
Limit Description
Maximum
Value Comment
Processors per node 16
Nodes per Expand network 255
Direct neighbors per node 63
Nodes per Fox ring 14 G-series only
OSIMAGE size 128 MB OSIMAGE must be on the system-load
volume. The H-series OSIMAGE is
much smaller, because the libraries
and programs that were formerly in
OSIMAGE are now in separate object
files.
Number of parameters to a
procedure
32 TAL limit. The maximum is 32 for a
callable
function and 31 if procedure is
callable and variable or extensible.
Parameters must also fit in 64 mask
bits. For C/C++ functions that are not
variable or extensible, there is
effectively no limit.
Number of characters in
procedure name in TAL or
pTAL
31 There is no specific limit for identifiers
in C/C++, but function names longer
than 32 characters cannot be exported
from the system library.
Number of entries in
destination control table
(DCT)
65,376 Devices share DCT with named
processes.
Logical device numbers
(LDEVs)
65,376
Device types 64K
Device/process subtypes 64
Number of subdevices per
device
Varies by
subsystem
Refer to appropriate subsystem
manual.