Path: utzoo!utgpu!water!watmath!clyde!mtunx!whuts!mhuxh!mhuxu!mhuxt!mhuxi!mhuhk!mhuxo!ulysses!gamma!pyuxp!pyuxe!pwy
From: pwy@pyuxe.UUCP (Peyton Yanchurak)
Newsgroups: comp.unix.wizards
Subject: Re: When did paging get into System V (was  Swap)
Summary: Some Versions of System V Release 2 are paging releases
Message-ID: <651@pyuxe.UUCP>
Date: 9 May 88 01:35:26 GMT
References: <53@lazlo.UUCP> <142700033@occrsh.ATT.COM>
Organization: Bell Communications Research
Lines: 35
Posted: Sun May  8 21:35:26 1988

In article <142700033@occrsh.ATT.COM>, rjd@occrsh.ATT.COM writes:
> 
> ::> 
> ::>      Does anyone know of a way to figure out how much swap space is in
> ::> use under System V?  I added the sticky bit to my shells and vi.  Now I
> ::On System V Release 2 Version 2 (paging) and later releases, the
> ::sar command has the -r option.  It tell how much memory and also
> ::how much swap space is currently available.  It gives
> ::you a history of free memory and swap space.
> ::
> ::				Peyton Yanchurak
> Peyton,
>   Sorry, Unix System V release 2 is swapping.  Release 3 is paging....
> 
> Randy

Sorry, although System V Release 3 and its derivatives are paging
releases, paging first appeared in a System V Release with System V
Release 2 Version 2 for the VAX at about December of 1984.
Shortly thereafter a provisional paging release for  the 3B20
came out (System V Release 2 Version 4).
The official paging Release for the 3B20 (System V Release 2.1 Version 3)
came out at about December of 1985.   Also at the year end of
1985 time frame, System V Release 2.1 for the 3B2  (also a paging
release) came out.

The content of pre 1985 releases of System V are confusing because
the same version numbers on the VAX and 3B20 hardware had different
meanings. As and example, System V Release 2 Version 2 for the 3B20
was a swaping release (this release had new diagnostics and I believe
support for  a floating point accelerator); there was no counterpart
for  the VAX.  Also System V Release 2.0 Version 3 for the 3B20
added support for 3b20 specific hardware features.  

					Peyton Yanchurak