Hello All Using R3 pool with images running ubuntu vms. Having three nodes… I have default settings for ms_asyc threads to 3 and rbd_op_thread to 1 How to improve below latency…mainly write.... # sed 's/^.\{60\}//' a WR RD WR_BYTES RD_BYTES WR_LAT RD_LAT 50/s 0/s 275 KiB/s 0 B/s 17.36 ms 0.00 ns 45/s 4/s 230 KiB/s 56 KiB/s 66.02 ms 6.90 ms 25/s 0/s 146 KiB/s 0 B/s 68.52 ms 0.00 ns 24/s 0/s 548 KiB/s 0 B/s 22.49 ms 0.00 ns 22/s 0/s 114 KiB/s 0 B/s 20.85 ms 0.00 ns 18/s 0/s 204 KiB/s 0 B/s 48.31 ms 0.00 ns 17/s 0/s 182 KiB/s 0 B/s 10.00 ms 0.00 ns 15/s 4/s 25 MiB/s 17 KiB/s 254.61 ms 17.42 ms 12/s 0/s 268 KiB/s 0 B/s 29.67 ms 0.00 ns 12/s 2/s 13 MiB/s 8.8 KiB/s 147.05 ms 2.30 ms 11/s 0/s 77 KiB/s 0 B/s 50.42 ms 0.00 ns 11/s 0/s 74 KiB/s 0 B/s 35.54 ms 0.00 ns 10/s 0/s 101 KiB/s 0 B/s 80.83 ms 0.00 ns 9/s 0/s 65 KiB/s 0 B/s 24.81 ms 0.00 ns 7/s 0/s 37 KiB/s 0 B/s 59.11 ms 0.00 ns 7/s 0/s 33 KiB/s 0 B/s 43.95 ms 0.00 ns 6/s 8/s 31 KiB/s 34 KiB/s 131.78 ms 127.46 us 4/s 0/s 18 KiB/s 0 B/s 56.90 ms 0.00 ns 4/s 0/s 23 KiB/s 0 B/s 74.13 ms 0.00 ns 3/s 0/s 18 KiB/s 0 B/s 38.25 ms 0.00 ns 2/s 0/s 10 KiB/s 0 B/s 26.28 ms 0.00 ns 2/s 0/s 11 KiB/s 0 B/s 49.80 ms 0.00 ns 1/s 0/s 90 KiB/s 0 B/s 43.02 ms 0.00 ns 1/s 0/s 8.8 KiB/s 0 B/s 24.99 ms 0.00 ns 1/s 0/s 10 KiB/s 0 B/s 102.38 ms 0.00 ns 1/s 0/s 15 KiB/s 0 B/s 57.23 ms 0.00 ns 0/s 0/s 7.2 KiB/s 0 B/s 149.90 ms 0.00 ns 0/s 0/s 4 KiB/s 0 B/s 1.58 ms 0.00 ns 0/s 0/s 3.2 KiB/s 0 B/s 1.02 ms 0.00 ns 0/s 0/s 819 B/s 0 B/s 40.45 ms 0.00 ns Regards Dev