Bruce Momjian <[EMAIL PROTECTED]> writes: > I don't feel too bad about the runtime cost if only subtransactions are > paying that cost.
That's exactly why I'm so exercised about what's been done to the HeapTupleSet/Get macros. That's significant cost that's paid even when you're not using *any* of this stuff. > I know we are really stretching the system here but I > would like to try a little more rather than give up and taking a space > hit for all tuples. I don't even have any confidence that there are no fundamental bugs in the phantom-xid concept :-(. I'd be willing to play along if an implementation that seemed acceptable speedwise were being offered, but this thing is not preferable to four-more-bytes even if it works. regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 1: subscribe and unsubscribe commands go to [EMAIL PROTECTED]