[jira] [Updated] (KUDU-2076) Deleting/updating is slow on single numeric row key tables

["Grant Henke (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KUDU-2076?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Grant Henke updated KUDU-2076:
------------------------------
    Component/s: perf

> Deleting/updating is slow on single numeric row key tables
> ----------------------------------------------------------
>
>                 Key: KUDU-2076
>                 URL: https://issues.apache.org/jira/browse/KUDU-2076
>             Project: Kudu
>          Issue Type: Bug
>          Components: perf, tablet
>    Affects Versions: 1.4.0
>            Reporter: Jean-Daniel Cryans
>            Priority: Major
>
> A user reported that deleting 50M rows on the simplest of tables, (id INT, text STRING, PRIMARY KEY (id)), doesn't complete.
> It reproduces locally and I was able to see that we're deleting 1.4 rows / ms which is awful considering that everything is cached.
> Todd found that we're spending most of our time decoding big blocks of bit-shuffled keys. Intuitively he though that having a composite row key would perform better and indeed adding a column set to 0 in front makes it 10x faster.



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