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0993142d8d
The current 4K write buffer is ridiculously small and forces Urchin to issue small I/O batches. Increase the buffer size to 64K. Before: Results: op rate : 27265 partition rate : 27265 row rate : 27265 latency mean : 1.2 latency median : 0.9 latency 95th percentile : 2.4 latency 99th percentile : 10.6 latency 99.9th percentile : 14.3 latency max : 44.7 Total operation time : 00:00:30 END After: Results: op rate : 35365 partition rate : 35365 row rate : 35365 latency mean : 0.9 latency median : 0.8 latency 95th percentile : 1.8 latency 99th percentile : 8.8 latency 99.9th percentile : 21.8 latency max : 272.2 Total operation time : 00:00:34 END Signed-off-by: Pekka Enberg <penberg@cloudius-systems.com>