At 6:03 AM -0500 12/14/99, Stephen Pair wrote:
>IIRC GemStone has
>(or had) some similar issues (but I think they used a separate object memory
>for each user as well).
>

GemStone Smalltalk has a shared object space, but each user gets a 
separate transactional view of the object space. You only see other 
users' changes to objects after they've committed their transaction, 
and after you've committed or aborted your transaction. Each user 
gets their own VM, which has some private object space, but most 
objects are accessed from memory shared by multiple VMs.

-Martin McClure