Hi. I'm seeing some odd numbers from kafka.SocketServerStats. Ideally, I'd like to have stats broken down per-topic, e.g. what's our most written/read topics? For write rates, I've got a separate process iterating topics every minute, doing this: (head_offset_now - head_offset_last) / (time_now - time_last) and inserting that into graphite (was previously inserting the head_offset, but graphite's derivative() on 2000+ topics was a bit much).
a graphite sumSeries() across them shows 20~25 MB/s on a single-instance kafka 0.7.2, which sounds correct, but when I compare that to the kafka.SocketServerStats we're collecting in graphite, derivative(TotalBytesWritten) shows 3.0GB/s, and BytesWrittenPerSecond shows 200KB/s, neither of which jive with my offset rate. Is anyone aware of any weirdness with those stats? thanks in advance for any insight, -neil
