Seeing 99th percentile put latencies at around 30-40 ms with 99.9th percentile jumping all the way up to 3-4s. This is riak 1.1 with the eleveldb backend on a 9-node cluster, N = 2, W = 1. Lots of free iops, but CPU is consistently burning 30-40% across all 8 cores.
Wondering if this could be caused by leveldb compactions which, to my knowledge, will wedge the scheduler for the duration of the compaction in riak 1.1. Any other thoughts for troubleshooting? Not a platform or erlang version with dtrace support so that's out. Thanks, D
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