> - by time - but the time stamp on each xlog record only specifies to the
> second, which could easily be 10 or more commits (we hope....)
>
> Should we use a different datatype than time_t for the commit timestamp,
> one that offers more fine grained differentiation between checkpoints?
Imho seconds is really sufficient. If you know a more precise position
you will probably know it from backend log or an xlog sniffer. With those
you can easily use the TransactionId way.
> - when we stop, keep reading records until EOF, just don't apply them.
> When we write a checkpoint at end of recovery, the unapplied
> transactions are buried alive, never to return.
> - stop where we stop, then force zeros to EOF, so that no possible
> record remains of previous transactions.
> I'm tempted by the first plan, because it is more straightforward and
> stands much less chance of me introducing 50 wierd bugs just before
> close.
But what if you restore because after that PIT everything went haywire
including the log ? Did you mean to apply the remaining changes but not
commit those xids ? I think it is essential to only leave xlogs around
that allow a subsequent rollforward from the same old full backup.
Or is an instant new full backup required after restore ?
Andreas
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