On Thu, Jan 5, 2012 at 9:01 AM, Florian Weimer wrote:
> * Robert Haas:
>> and (c) architectures (like 32-bit x86) where ordinary 64-bit
>> operations aren't atomic but special instructions (cmpxchg8b) can be
>> used to get that behavior.
>
> FILD and FIST are atomic, too, and are supported by more
* Robert Haas:
> and (c) architectures (like 32-bit x86) where ordinary 64-bit
> operations aren't atomic but special instructions (cmpxchg8b) can be
> used to get that behavior.
FILD and FIST are atomic, too, and are supported by more
micro-architectures.
--
Florian Weimer
BFK
On Tue, Jan 3, 2012 at 2:22 PM, Tom Lane wrote:
>> Another thought is that it should always be safe to reuse an old
>> snapshot if no transactions have committed or aborted since it was
>> taken
>
> Yeah, that might work better. And it'd be a win for all MVCC snaps,
> not just the ones coming fro
