Comment 17 for bug 1430852

Wgrant has pointed out that my postgresql is a little rusty, and this is using the index - but its still having to hit all 6K rows - getting an explain (analyze on, buffers on) would help with determining if this is entirely IO driven, or something else; making it possible to answer the 50 most recent from an index should be possible fairly easily - and thats going to be needed if this is just IO seeks killing performance.