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On 07/30/2015 07:14 AM, Simon Riggs wrote:
> On 30 July 2015 at 14:26, Alexander Korotkov
> <a.korotkov@postgrespro.ru
>
> Any thoughts? Do you think 64-bit XIDs worth it?
>
> The problem of freezing is painful, but not impossible, which is
> why we have held out so long.
>
> The problem of very long lived snapshots is coming closer at the
> same speed as freezing; there is no solution to that without 64-bit
> xids throughout whole infrastructure, or CSNs.
>
> The opportunity for us to have SQL Standard historical databases
> becomes possible with 64-bit xids, or CSNs. That is a high value
> goal.
>
> I personally now think we should thoroughly investigate 64-bit
> xids. I don't see this as mere debate, I see this as something that
> we can make a patch for and scientifically analyze the pros and
> cons through measurement.
+1
I've been thinking along similar lines to both of you for quite some
time now. I think at the least we should explore an initdb time option
- -- we can and should measure the pros and cons.
- --
Joe Conway
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