On Wednesday, September 25, 2002, at 11:41 AM, Nickolay Samofatov wrote:

> Hello Jim,
>
> Wednesday, September 25, 2002, 10:34:17 PM, you wrote:
>
>> Having been through the "hoard" paper and thought about it some,
>> I don't think it has much to offer a multi-threaded database
>> server.
>
>> [...]
> You are wrong, at least partially. Let's consider simple case:
> You have 4 heaps A, B, C and D. Even in worst case when memory is
> distributed evenly between threads and heaps if you lock heap D to
> deallocate some memory heaps A, B and C can still be freely used
> for both allocation and deallocation.
>
> [...]

And to throw my 2 cents in this conversation, the new memory code in
FB2 already allows for arbitrary memory pool hierarchies. Just using
that existing ability might be enough to eliminate most of the
contention, without going through the effort of switching memory
managers.

-John