Well, folks, I'm feeling a little stupid right now (adding to the injury inflicted by one Mr. Stump :-P).So, here's the story. The cache hit rate is up around 97% now. The ruby code is down to around 20-25ms to multiget the 20 rows. I did some profiling, though, and realized that a lot of time was being spent in thrift. Turns out, that's where pretty much all the time was going.I just ran the same test using java (scala) and the load is taking around 2-4ms.