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https://issues.apache.org/jira/browse/HBASE-10047?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Lars Hofhansl resolved HBASE-10047.
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Resolution: Later
Can't measure any meaningful perf enhancement in a real world setup. I might to
come back to this one later.
Might need to look at calling nextRow in RegionScannerImpl anyway.
> postScannerFilterRow consumes a lot of CPU in tall table scans
> --------------------------------------------------------------
>
> Key: HBASE-10047
> URL: https://issues.apache.org/jira/browse/HBASE-10047
> Project: HBase
> Issue Type: Bug
> Reporter: Lars Hofhansl
> Attachments: 10047-0.94-poc-v3.txt, 10047-0.94-poc-v4.txt,
> 10047-0.94-sample-v2.txt, 10047-0.94-sample.txt, postScannerFilterRow.png
>
>
> Continuing my profiling quest, I find that in scanning tall table (and
> filtering everything on the server) a quarter of the time is now spent in the
> postScannerFilterRow coprocessor hook.
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