Grokbase Groups HBase dev April 2010
FAQ
Less ArrayList churn on the scan path
-------------------------------------

Key: HBASE-2496
URL: https://issues.apache.org/jira/browse/HBASE-2496
Project: Hadoop HBase
Issue Type: Improvement
Affects Versions: 0.20.3
Reporter: Jean-Daniel Cryans
Assignee: Jean-Daniel Cryans
Fix For: 0.20.5, 0.21.0


Doing some profiling when testing the scanning speed of 0.20.4, I saw that we are spending a lot of time instantiating ArrayLists when scanning and that we could sometime set the right size of the arrays. I don't expect big improvements for short scans, but people like us who are scanning in batches of 10k could get some nice speedups.

--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.

Search Discussions

  • Jean-Daniel Cryans (JIRA) at Apr 28, 2010 at 6:02 pm
    [ https://issues.apache.org/jira/browse/HBASE-2496?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

    Jean-Daniel Cryans resolved HBASE-2496.
    ---------------------------------------

    Hadoop Flags: [Reviewed]
    Resolution: Fixed

    Committed to branch and trunk (and I added some more finals in ColumnCount). Thanks for reviewing guys!
    Less ArrayList churn on the scan path
    -------------------------------------

    Key: HBASE-2496
    URL: https://issues.apache.org/jira/browse/HBASE-2496
    Project: Hadoop HBase
    Issue Type: Improvement
    Affects Versions: 0.20.3
    Reporter: Jean-Daniel Cryans
    Assignee: Jean-Daniel Cryans
    Fix For: 0.20.5, 0.21.0

    Attachments: HBASE-2496.patch


    Doing some profiling when testing the scanning speed of 0.20.4, I saw that we are spending a lot of time instantiating ArrayLists when scanning and that we could sometime set the right size of the arrays. I don't expect big improvements for short scans, but people like us who are scanning in batches of 10k could get some nice speedups.
    --
    This message is automatically generated by JIRA.
    -
    You can reply to this email to add a comment to the issue online.

Related Discussions

Discussion Navigation
viewthread | post
Discussion Overview
groupdev @
categorieshbase, hadoop
postedApr 28, '10 at 12:42a
activeApr 28, '10 at 6:02p
posts2
users1
websitehbase.apache.org

1 user in discussion

Jean-Daniel Cryans (JIRA): 2 posts

People

Translate

site design / logo © 2022 Grokbase