[TUHS] VAX System V

[Brad Spencer via TUHS]

Ron Natalie via TUHS <tuhs at tuhs.org> writes:

> System V on the VAX was underwhelming.    It lacked demand paging which 
> all the BSD variants on the VAX already had four years or so before
> System V was released on the VAX.   System V didn’t finally get real 
> virtual memory until SysVR2.4.
>

[snip]

I wasn't privy to that particular problem, but I do remember that some
earlier versions had poor quality SMP support and that messed with the
product I worked on at AT&T with respect to performance.  Like I
mentioned the product I worked on ate a whole Vax and really needed
multiple CPUs to work well.  When they fixed SMP in later versions the
situation improved for the product.




-- 
Brad Spencer - brad at anduin.eldar.org