While writing a performance test for
ACCUMULO-4112, I noticed the performance drop for large numbers of tablets hosted on a single server.
Some decrease in performance is expected since the various queues and buffers are being divided among a greater number of tablets, but a 5x decrease is unexpected. Given other fixes (
ACCUMULO-3423, for example) I would not expect performance to drop off so dramatically.
Investigate the performance of conditional updates going to many tablets, vs one tablet.