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https://issues.apache.org/jira/browse/HBASE-13369?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14388569#comment-14388569
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Ted Yu commented on HBASE-13369:
--------------------------------
Verified the patch on cluster.
We would see the following metrics at server level:
{code}
"ScanNext_num_ops" : 1466,
"ScanNext_min" : 171610,
"ScanNext_max" : 650000,
"ScanNext_mean" : 633502.0702592087,
"ScanNext_median" : 649115.0,
"ScanNext_75th_percentile" : 650000.0,
"ScanNext_95th_percentile" : 650000.0,
"ScanNext_99th_percentile" : 650000.0,
{code}
> Expose scanNext stats to region server level
> --------------------------------------------
>
> Key: HBASE-13369
> URL: https://issues.apache.org/jira/browse/HBASE-13369
> Project: HBase
> Issue Type: Improvement
> Reporter: Ted Yu
> Assignee: Ted Yu
> Attachments: 13369-master-v1.txt
>
>
> Regions have a scanNext_num_ops stat but there is no such stat at the
> regionserver level. The num_ops metrics at the RS level (exposed through JMX)
> are as follows:
> {code}
> "SyncTime_num_ops" : 54,
> "AppendSize_num_ops" : 56,
> "AppendTime_num_ops" : 56,
> "Append_num_ops" : 0,
> "Delete_num_ops" : 0,
> "Mutate_num_ops" : 0,
> "Get_num_ops" : 0,
> "Replay_num_ops" : 0,
> "Increment_num_ops" : 0,
> "QueueCallTime_num_ops" : 53,
> "ProcessCallTime_num_ops" : 53,
> {code}
> We need a scanNext_num_ops, along with 95th percentile stat, at the RS level.
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