the used memory is 90% of maxmemory which is exactly what we set the eviction watermark to be
the total keys increases about 5k in 30 min
i see, yes it should work well.
we just released 1.12, so this feature is now officially available
yep! I downloaded and the above is running 1.12 now
Thanks for the great work and turnaround 
Our pleasure! Thanks for adopting us!