[HBASE-17324] PE Write workload results are wrong

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Assignee: Unassigned
• Reporter: Apekshit Sharma
• Created: 15/Dec/16 20:11
• Updated: 19/Dec/16 02:25

Description

jmspaggi found this issue of write latencies being unreasonable.

The reason is, we are using BufferedMutator with size 2MB, so most writes return very quick because they get buffered. That's giving us avg. latency like 39us. Needs fixing.

16/12/14 12:46:04 INFO hbase.PerformanceEvaluation: Latency (us) : mean=39,37, min=2,00, max=27193408,00, stdDev=3443,01, 50th=2,00, 75th=2,00, 95th=3,00, 99th=5,00, 99.9th=9157,00, 99.99th=39685,59, 99.999th=160751,28
16/12/14 12:46:04 INFO hbase.PerformanceEvaluation: Num measures (latency) : 100000000
16/12/14 12:46:04 INFO hbase.PerformanceEvaluation: Mean      = 39,37
Min       = 2,00
Max       = 27193408,00
StdDev    = 3443,01
50th      = 2,00
75th      = 2,00
95th      = 3,00
99th      = 5,00
99.9th    = 9157,00
99.99th   = 39685,59
99.999th  = 160751,28