Hi everyone,

Just looked on the IBM website for info relating to shared memory and IPC limits in AIX, and found a few useful-looking documents:

The Interprocess Communication (IPC) Overview
"This document defines the interprocess communication (IPC) and is applicable to AIX versions 3.2.x and 4.x."

Lots of the stuff here is very intro-level, but some still looks useful.

vmtune Parameters
"This document discusses the vmtune command used to modify the Virtual Memory Manager (VMM) parameters that control the behavior of the memory management subsystem. This information applies to AIX Versions 4.x."

And an obscure reference to the AIX shmget(2) manpage says that there is a non-tunable maximum shared-memory segment size of 256MB:


Hope some of this is useful.

Regards and best wishes,

Justin Clift

"My grandfather once told me that there are two kinds of people: those
who work and those who take the credit. He told me to try to be in the
first group; there was less competition there."
- Indira Gandhi

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