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(libc.info)Memory Resources

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Querying memory available resources
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   The amount of memory available in the system and the way it is
organized determines oftentimes the way programs can and have to work.
For functions like `mmap' it is necessary to know about the size of
individual memory pages and knowing how much memory is available enables
a program to select appropriate sizes for, say, caches.  Before we get
into these details a few words about memory subsystems in traditional
Unix systems will be given.

Memory Subsystem

Overview about traditional Unix memory handling.

Query Memory Parameters

How to get information about the memory

subsystem?