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Operating Systems AIX Maxuproc parameter and number of processes Post 303033613 by MadeInGermany on Tuesday 9th of April 2019 05:31:17 AM
Old 04-09-2019
A Unix-compatible process table is still fixed. Only LWPs are not limited on some OS.
In AIX, according to my link, it is 262144. Not tunable.
Solaris and HP-UX have 30000, tunable.
Linux has 32768, shared with LWPs, tunable.
 

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msgmax(5)							File Formats Manual							 msgmax(5)

NAME
msgmax - maximum System V IPC message size in bytes (OBSOLETE) DESCRIPTION
The tunable is obsolete and has been removed. This tunable specified the maximum allowable size, in bytes, of any single message in a System V message queue. This tunable is implied by the tunable msgmnb(5) (the size of a queue). For more information about System V message queues, refer to the section of the mesg(5) manpage. WARNINGS
All HP-UX kernel tunable parameters are release specific. This parameter has been obsoleted for HP-UX 11i Version 3 and forward. AUTHOR
was developed by AT&T. SEE ALSO
msgsnd(2), mesg(5), msgmbs(5), msgmap(5), msgmnb(5), msgmni(5), msgseg(5), msgssz(5), msgtql(5). OBSOLETE
Tunable Kernel Parameters msgmax(5)
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