Jean-Daniel Cryans created KUDU-2076:
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Summary: 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: tablet
Affects Versions: 1.4.0
Reporter: Jean-Daniel Cryans
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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