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Large PID is feature of HP-UX 11i v3. The range of Process
Identifiers (PID) the kernel can generate in a stand-alone HP-UX
system has been expanded from 0 ~ 30,000 to 0 ~ 2^^30-1 (1,073,741,823). Summary
of Change | |
What’s
New for Customers Migrating from HP-UX 11i v1 September 2005?Max process ID can be as high as 2^^30-1 (1,073,741,823) rather
than 30,000. Two new kernel tunable parameters have been added to
provide control over the values used by the system. What’s
New for Customers Migrating from HP-UX 11i v2 June 2006? Max process ID can be as high as 2^^30-1 (1,073,741,823) rather
than 30,000. Two new kernel tunable parameters have been added to
provide control over the values used by the system. Impact | |
HP-UX customers can use the kernel parameter tuning command, ktune(1M),
with the new kernel parameters, process_id_min and process_id_max, to tune the range of process IDs. If the feature is utilized, certain commands, such as ps(1) and top(1),
that display process IDs will necessarily change the number of columns
displayed to represent process IDs. Compatibility | |
Some applications may have built-in assumptions about the
range of values for process IDs, or that specific values are assigned
to some specific processes. These applications may exhibit undesired
behaviors or fail if process_id_min and/or process_id_max are set to values higher than their defaults of 0 and
30,000, respectively. For more details, see the process_id_max(5) manpage
and the whitepaper “Number of Processes and Process ID Values
on HP-UX,” available at http://docs.hp.com. Performance | |
There are no known performance issues. Obsolescence | |
Not applicable. |
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