[HBASE-18469] Correct RegionServer metric of totalRequestCount

• Type: Improvement
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 1.2.0, 1.3.0
• Fix Version/s: 1.4.0, 2.0.0
• Component/s: metrics, regionserver
• Hadoop Flags: Incompatible change, Reviewed

Release Note

In HBASE-18469 we introduced a new RegionServer metrics in name of "totalRowActionRequestCount" which counts in all row actions and equals to the sum of "readRequestCount" and "writeRequestCount". Meantime, we have changed "totalRequestCount" to count only once for multi request, while previously we will count in action number of the request. As a result, existing monitoring system on totalRequestCount will still work but see a smaller value, and we strongly recommend to change to use the new metrics to monitor server load.

• Assignee: Yu Li
• Reporter: Shibin Zhang
• Created: 28/Jul/17 07:37
• Updated: 18/Apr/19 08:56
• Resolved: 11/Aug/17 11:14

Description

when i get the metric ,i found this three metric may be have some error as follow :

"totalRequestCount" : 17541,
"readRequestCount" : 17483,
"writeRequestCount" : 1633,

Issue Links

• is related to: AMBARI-24256 Ambari Grafana HBase metrics wrong - readRequestCount > totalRequestCount!
• is related to: HBASE-20626 Change the value of "Requests Per Second" on WEBUI
• relates to: HBASE-19035 Miss metrics when coprocessor use region scanner to read data
• relates to: HBASE-18374 RegionServer Metrics improvements
• links to: Discussion in user mailing list