Re: XID formatting and SLRU refactorings (was: Add 64-bit XIDs into PostgreSQL 15)

Hi,

> As suggested before by Heikki Linnakangas, I've added a patch for making 2PC transaction state 64-bit.
> At first, my intention was to rebuild all twophase interface to use FullTransactionId. But doing this in a proper
> manner would lead to switching from TransactionId to FullTransactionId in PGPROC and patch become too
> big to handle here.
>
> So I decided to keep it simple for now and use wrap logic trick and calc FullTransactionId on current epoch,
> since the span of active xids cannot exceed one epoch at any given time.
>
> Patches 1 and 2 are the same as above.

Thanks! 0003 LGTM. I'll mark the CF entry as RfC.

> I propose that we try to finish 1 and 2 for v16. And maybe 6. I think
> that's doable. It doesn't have any great user-visible benefits yet, but
> we need to start somewhere.

+1.

However there are only a few days left if we are going to do this
within March CF...

-- 
Best regards,
Aleksander Alekseev