Richard Huxton <dev(at)archonet(dot)com> writes:
> Two questions Tom:
> 1. Do the stats tables record FK checks, or just explicit table accesses?
The stats record everything, IIRC.
> If the only real activity is this update then simple before/after
> views of the stats might be revealing.
That's quite a good thought, though since Rosser's system is live it
might be hard to get a view of just one query's activity.
regards, tom lane