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https://issues.apache.org/jira/browse/HBASE-15222?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Elliott Clark updated HBASE-15222:
----------------------------------
Attachment: HBASE-15222-v8.patch
Use fast long histogram for both histogram and for timerange/sizerange
estimates.
Benchmarks:
{code}
Benchmark Mode Cnt Score Error
Units
HistogramBenchmark.fastLong sample 3338218 401.795 ± 37.543
ns/op
HistogramBenchmark.testHDRAtomic sample 2952135 780.955 ± 27.390
ns/op
HistogramBenchmark.testHDRConcurrent sample 2875714 844.485 ± 43.087
ns/op
HistogramBenchmark.testMutableTimeHistogram sample 4192279 304.305 ± 20.453
ns/op
HistogramBenchmark.testYammer sample 2747876 1508.518 ± 48.166
ns/op
{code}
> Use less contended classes for metrics
> --------------------------------------
>
> Key: HBASE-15222
> URL: https://issues.apache.org/jira/browse/HBASE-15222
> Project: HBase
> Issue Type: Bug
> Components: metrics
> Affects Versions: 2.0.0, 1.2.0, 1.3.0
> Reporter: Elliott Clark
> Assignee: Elliott Clark
> Priority: Critical
> Fix For: 2.0.0, 1.3.0
>
> Attachments: HBASE-15222-v1.patch, HBASE-15222-v2.patch,
> HBASE-15222-v3.patch, HBASE-15222-v5.patch, HBASE-15222-v6.patch,
> HBASE-15222-v8.patch, HBASE-15222.patch
>
>
> Running the benchmarks now, but it looks like the results are pretty extreme.
> The locking in our histograms is pretty extreme.
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