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https://issues.apache.org/jira/browse/HBASE-15377?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Heng Chen updated HBASE-15377:
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Attachment: HBASE-15377_v2.patch
> Per-RS Get metric is time based, per-region metric is size-based
> ----------------------------------------------------------------
>
> Key: HBASE-15377
> URL: https://issues.apache.org/jira/browse/HBASE-15377
> Project: HBase
> Issue Type: Sub-task
> Reporter: Enis Soztutar
> Assignee: Heng Chen
> Fix For: 2.0.0, 1.3.0, 1.4.0
>
> Attachments: HBASE-15377.patch, HBASE-15377_v1.patch,
> HBASE-15377_v2.patch
>
>
> We have metrics for Get operations at the region server level and region
> level.
> {code}
> "Get_num_ops" : 4837505,
> "Get_min" : 0,
> "Get_max" : 296,
> "Get_mean" : 0.2934618155433431,
> "Get_median" : 0.0,
> "Get_75th_percentile" : 0.0,
> "Get_95th_percentile" : 1.0,
> "Get_99th_percentile" : 1.0,
> {code}
> and
> {code}
> "Namespace_hbase_table_meta_region_1588230740_metric_get_num_ops" : 103,
> "Namespace_hbase_table_meta_region_1588230740_metric_get_min" : 450,
> "Namespace_hbase_table_meta_region_1588230740_metric_get_max" : 470,
> "Namespace_hbase_table_meta_region_1588230740_metric_get_mean" :
> 450.19417475728153,
> "Namespace_hbase_table_meta_region_1588230740_metric_get_median" : 460.0,
> "Namespace_hbase_table_meta_region_1588230740_metric_get_75th_percentile"
> : 470.0,
> "Namespace_hbase_table_meta_region_1588230740_metric_get_95th_percentile"
> : 470.0,
> "Namespace_hbase_table_meta_region_1588230740_metric_get_99th_percentile"
> : 470.0,
> {code}
> The problem is that the report values for the region server shows the
> latency, versus the reported values for the region shows the response sizes.
> There is no way of telling this without reading the source code.
> I think we should deprecate response size histograms in favor of latency
> histograms.
> See also HBASE-15376.
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