Hari Sekhon created HBASE-20883:
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Summary: HMaster UI Read+Write Requests per sec across
RegionServers
Key: HBASE-20883
URL: https://issues.apache.org/jira/browse/HBASE-20883
Project: HBase
Issue Type: Improvement
Components: Admin, master, metrics, monitoring, UI, Usability
Affects Versions: 1.1.2
Reporter: Hari Sekhon
HMaster UI currently shows Requests Per Second per RegionServer under
/mater-status Region Servers -> Base Stats section in the Web UI.
Please add Reads Per Second and Writes Per Second per RegionServer alongside
this in the HMaster UI, and also expose the Read/Write/Total requests per sec
information in the HMaster JMX API.
This will make it easier to find read or write hotspotting on HBase as a
combined total will minimize and mask differences between RegionServers. For
example, we do 30,000 reads/sec but only 900 writes/sec to each RegionServer,
so write skew will be masked as it won't show enough significant difference in
the much larger combined Total Requests Per Second stat.
For now I've written a Python tool to calculate this info from RegionServers
but since HMaster is collecting this info anyway it shouldn't be a big change
to improve it to also show Reads / Writes Per Sec.
Find my tools for more granular Read/Write Requests Per Sec Per Regionserver
and also per region at my [PyTools github
repo|https://github.com/harisekhon/pytools] along with a selection of other
HBase tools I've used for performance debugging over the years.
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