[
https://issues.apache.org/jira/browse/HBASE-10047?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13853750#comment-13853750
]
Lars Hofhansl commented on HBASE-10047:
---------------------------------------
Thanks [~apurtell]. Oops, yes, missed the break there.
I'll do a few more tests with more columns. If there still is measurable gain,
we can consider this.
Maybe even better - we test all coprocessors at load time and only keep
implementors of RegionObserver. That we all casting at "runtime" could be
removed.
> 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-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.
--
This message was sent by Atlassian JIRA
(v6.1.4#6159)
