> 2) If it's in milliseconds, are these numbers in expected range (see > attached image). To me 2.5 seconds (2.5K ms) latency for add entry request > is very high. 2.5 seconds is very high, but your write rate is also high. 100,000 * 1KB is 100MB/s. SSD should be able to take it from the journal side, but it depends on the hardware.
Have you tried reducing the write rate to see how the latency changes? What is the client seeing for latency? I assume the client and all servers have 10GigE nics? Your images didn't attach correctly. Maybe they're too big to post directly to the list. There is a size limit, but I don't know what it is. -Ivan