Enis Soztutar created HBASE-15377:
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Summary: 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
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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