MPE/iX 5.5 Operating System Limits

Although it is possible to configure more than 2500 terminal I/O devices, neither the
inactive sessions nor the active sessions should exceed 2500.
Buffers: Two buffer pools are created during system configuration
One for Inbound and the other for Outbound per system.
Inbound Buffers Max = 400(Performance Limit) Two 256 bytes buffers per ldev will be
used.
Outbound Buffers Min = 64(Max limited by BFM ??)
The exact formula for determining the number of buffers in this pool is still to
determined, but the total space is used by the pool is expected to be much smaller than
the space used by all the outbound buffer pools in previous releases(<4.0) This pool will
be used by for all outbound packets generated at any level in the driver.
For each session that is active, there is a per/session limit of 24 data output buffers that
can be allocated at one time. This is to prevent one greedy process from allocating all of
the output buffers that are shared among all DTC terminal and printer devices.
Other dependencies:
- Ports - System limit is 32765
- Processes - System limit is 8190
Telnet limits
Maximum no. of Telnet options which can be negotiated = 255. This is defined by the
Telnet spec and is not a limitation due to the MPE implementation.
Maximum buffer size = 4096 (Performance limit)
Maximum logical buffer pools = 8192 (Performance limit)
Maximum no. of buffers per logical buffer pool allowed = 32767 (Performance limit)
Maximum no. of telnet connections is limited by various factors.
1. No. of ldevs on the system Each connection requires an ldev.