Re: pg_upgrade < 9.3 -> >=9.3 misses a step around multixacts

On 2014-07-21 13:03:21 -0400, Tom Lane wrote:
> Andres Freund <andres@2ndquadrant.com> writes:
> > On 2014-07-21 12:43:24 -0400, Tom Lane wrote:
> >> Will fix.
>
> > I wonder if GetTopTransactionId()/MultiXactIdSetOldestMember() and using
> > lastSane* = ReadNew* isn't sufficient. After the xid assignment
> > concurrent GetOldest* can't go below the ReadNew* values anymore, right?
>
> I don't see any point in being picky about it.  What we want is to reject
> values that are conclusively bogus; things that are just close to bogus
> are not so interesting.

It'd just have been about optimizing away repeated calls to ReadNew*...

Thanks.

Greetings,

Andres Freund

--
 Andres Freund                       http://www.2ndQuadrant.com/
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