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Posted to dev@hbase.apache.org by "Lars Hofhansl (JIRA)" <ji...@apache.org> on 2015/09/25 06:41:04 UTC

[jira] [Created] (HBASE-14489) postScannerFilterRow consumes a lot of CPU

Lars Hofhansl created HBASE-14489:
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             Summary: 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


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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