Guardian Procedure Calls Reference Manual

Table 55 Per-Processor Limits
CommentMaximum ValueLimit Description
Architectural limit; current practical limit is
much lower.
64KProcesses
Implementation limit. Limit is reached when
processor runs out of a resource such as CPU
4,000 for all G-series RVUs
8,086 for earlier J-series and
H-series RVUs
Processes
cycles, types of memory (operating system
aliased, memory, other virtual memory, or
12,100 as of H06.22 and
J06.11 RVUs
physical memory) or other limits documented
in this Appendix.
Limited by system data space availability;
defaults to 1.5 times number of configured
3,600 for TNS/R
20,000 for TNS/E
Time-list elements (TLEs)
PCBs. The last 100 TLEs are available only
to system processes.
1 microsecTimestamp resolution
Varies with server modelPhysical memory
8,189 unit segments, where 1 unit
segment=128 KB (G04.00 and earlier
G-series RVUs)
< 1 GBAliased virtual memory
7,933 unit segments, where 1 unit
segment=128 KB (G05.00 and later
G-series RVUs)
32 KBSYSPOOL size
512 KBEXTPOOL size
Varies based on demand; limited by
physical and aliased virtual memory.
998 MBFLEXPOOL size
All G-series RVUs.4,000Open Binary semaphores
H06.21 and earlier H-series RVUs, and
J06.10 and earlier J-series RVUs.
8,186
H06.22 and later H-series RVUs and J06.11
and later J-series RVUs.
65,536
32 or 64 bitsCounters displayed by PEEK
Number of Phoenix processes96Number of concurrent process
creations and deletions
32KNumber of concurrent swap file
opens
Controls the absolute maximum number of
concurrent outstanding messages to/from
<256K
1
<512K
2
Absolute maximum number of
Message Quick Cells (MQCs)
the processor. An MQC is needed for each
outstanding message. The size of the MQC
depends upon the size of the message.
The maximum number of MQCs allowed per
processor is the lesser of the following: (a)
6.1 MB
3
128 MB
4
Maximum memory allowed for
MQS per processor
the absolute maximum, and (b) the maximum
1 GB
5
number of MQCs that can be instantiated
given the maximum memory allowed for
MQCs. Note that (b) depends on the MQC
sizes instantiated in the processor. To view
the MQC usage statistics in the processor,
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