Technical data

84 Chapter5
Technical Articles
BIGPIN Feature: Support Up To 12000 Concurrent Processes.
BIGPIN Feature: Support Up To 12000 Concurrent
Processes.
By Scott J. McClellan
MPE/iX System Architect
Commercial Systems Division
INTRODUCTION
The maximum number of concurrent processes (sometimes referred to as MAXPIN) has
been a key constraint limiting MPE/iX in high-growth, high-end customer environments.
Removing this constraint is one of the key ingredients in Hewlett-Packard's continuing
strategy to evolve MPE/iX -- providing growth for our high-end customers.
The new MAXPIN limit in MPE/iX Release 7.0 Express 1 has been raised from 8190 to
12000.
MPE/iX Release 7.0 Express 1 contains a new SYSGEN feature, which allows customers to
enable support for greater than 8190 concurrent processes (referred to as BIGPIN).
WHO SHOULD READ THIS ARTICLE?
• High-end customers
• System Administrators for high-end systems
• Third-party software developer (or customers) with privileged applications and/or
applications that explicitly use Process Identification Numbers.
Feature Base MPE/iX
7.0 Release
MPE/iX Release 7.0 Express
1
Core OS support for > 8190 concurrent processes Yes
(cannot be
enabled)
Yes
(disabled by default - can
be enabled with SYSGEN)
Maximum value for MAXPIN.
(Actual value for a given system will be
determined by the MAXPIN scaling algorithm)
8190 12000
(Requires > 2GB memory,
BIGPIN enabled, and is
restricted to N-Class
systems).
Enhanced "Program File Event" Logging Yes Yes
SYSGEN>misc>system bigpin=on feature No Yes
HPMAXPIN CI Variable Yes Yes
Improved MAXPIN scaling algorithm Yes Yes
All HP products and subsystem have been
modified to support > 8190 concurrent processes.
No Yes