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https://issues.apache.org/jira/browse/HBASE-14489?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Lars Hofhansl updated HBASE-14489:
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Attachment: 14489-master.txt
Patch for master. Note the signature change for postScannerFilterRow where the
deprecated method could also be implemented. Meh.
> postScannerFilterRow consumes a lot of CPU
> ------------------------------------------
>
> Key: HBASE-14489
> URL: https://issues.apache.org/jira/browse/HBASE-14489
> Project: HBase
> Issue Type: Bug
> Reporter: Lars Hofhansl
> Assignee: Lars Hofhansl
> Labels: performance
> Fix For: 2.0.0, 1.2.0, 1.3.0, 0.98.15, 1.0.3, 1.1.3
>
> Attachments: 14489-0.98.txt, 14489-master.txt
>
>
> During an unrelated test I found that when scanning a tall table with CQ only
> and filtering most results at the server, 50%(!) of time is spend in
> postScannerFilterRow, even though the coprocessor does nothing in that hook.
> We need to find a way not to call this hook when not needed, or to question
> why we have this hook at all.
> I think [~ram_krish] added the hook (or maybe [~anoop.hbase]). I am also not
> sure whether Phoenix uses this hook ([~giacomotaylor]?)
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