> Todo:
>
> 1. Compact log files after checkpoint (save records of uncommitted
> transactions and remove/archive others).
On the grounds that undo is not guaranteed anyway (concurrent heap access),
why not simply forget it, since above sounds rather expensive ?
The downside would only be, that long running txn's cannot [easily] rollback
to savepoint.
> 2. Abort long running transactions.
This is imho "the" big downside of UNDO, and should not simply be put on
the TODO without thorow research. I think it would be better to forget UNDO for long
running transactions before aborting them.
Andreas
