> 
> All VAXen only have 512 byte pages. This granularity is a bit fine for 
> most peoples taste, and it also makes for big data structures in Unix. I 
> think it was 1K already with Ultrix, but anyway, it's been 1K for a long 
> time. A few years ago Ragge (I think it was) decided that it would be 
> even better with 4K pages, so it was bumped.
>
Yes, it was discovered around 1980 or so that 512-byte pages would cause
too much page faults, so the page clusters were set to 1K on vax.
Since then programs has grown quite much, so I did a test some years
ago and found that 4K pages gave a large speedup in starting and
running programs, without wasting too much memory.

-- Ragge