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https://issues.apache.org/jira/browse/HBASE-20883?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hari Sekhon updated HBASE-20883:
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Summary: HMaster Read / Write Requests Per Sec across RegionServers,
currently only Total Requests Per Sec (was: HMaster Read+Write Requests Per
Sec across RegionServers, currently only Total Requests Per Sec)
> HMaster Read / Write Requests Per Sec across RegionServers, currently only
> Total Requests Per Sec
> --------------------------------------------------------------------------------------------------
>
> 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
> Priority: Major
>
> 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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