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https://issues.apache.org/jira/browse/HBASE-17324?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Appy updated HBASE-17324:
-------------------------
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.
{noformat}
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
{noformat}
was:
During writing, 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.
{noformat}
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
{noformat}
> PE Write workload results are wrong
> -----------------------------------
>
> Key: HBASE-17324
> URL: https://issues.apache.org/jira/browse/HBASE-17324
> Project: HBase
> Issue Type: Bug
> Reporter: Appy
>
> [~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.
> {noformat}
> 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
> {noformat}
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