Hey, We've seen a considerable increase in the number of dropped mutations after a major upgrade from 1.2.18 to 2.0.10. I initially thought it was due to the extra load incurred by upgradesstables, but the dropped mutations continue even after all sstables are upgraded.
Additional info: Overall (read, write and range) latency improved with the upgrade, which is great, but I don't understand why dropped mutations has increased. I/O and CPU load is pretty much the same, number of completed tasks is the only metric that increased together with dropped mutations. I also noticed that the number of "all time blocked" FlushWriter operations is about 5% of completed operations, don't know if this is related, but in case it helps out... Anyone has a clue on what could that be? Or what should we monitor to find out? Any help or JIRA pointers would be kindly appreciated. Cheers, -- *Paulo Motta* Chaordic | *Platform* *www.chaordic.com.br <http://www.chaordic.com.br/>* +55 48 3232.3200
