Hi, On 2018-07-06 22:03:12 +0200, Magnus Hagander wrote: > *If* we can provide the snapshots view of them without too much overhead I > think it's worth looking into that while *also* proviiding a lower overhead > interface for those that don't care about it.
I don't see how that's possible without adding significant amounts of complexity and probably memory / cpu overhead. The current stats already are quite inconsistent (often outdated, partially updated, messages dropped when busy) - I don't see what we really gain by building something MVCC like in the "new" stats subsystem. > If it ends up that keeping the snapshots become too much overhead in either > in performance or code-maintenance, then I agree can probably drop that. > But we should at least properly investigate the cost. I don't think it's worthwhile to more than think a bit about it. There's fairly obvious tradeoffs in complexity here. Trying to get there seems like a good way to make the feature too big. Greetings, Andres Freund
