[
https://issues.apache.org/jira/browse/CASSANDRA-21414?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Dmitry Konstantinov updated CASSANDRA-21414:
--------------------------------------------
Change Category: Performance
Complexity: Low Hanging Fruit
Status: Open (was: Triage Needed)
> Reduce cost to calculate BTreeRow.minDeletionTime
> -------------------------------------------------
>
> Key: CASSANDRA-21414
> URL: https://issues.apache.org/jira/browse/CASSANDRA-21414
> Project: Apache Cassandra
> Issue Type: Improvement
> Components: Local/Other
> Reporter: Dmitry Konstantinov
> Assignee: Dmitry Konstantinov
> Priority: Normal
> Attachments: image-2026-05-31-22-04-44-862.png
>
>
> When we do a merge on read (or when we build a row from data sent from a
> client) we need to calculate minDeletionTime value, currently it is done by
> BTreeRow.Builder#build and it iterates over cells to calculate this value,
> for simple and typical cases we can build it while Builder is being filled
> with data to avoid the iteration overheads.
> It costs about 1.4% of CPU for a 10 row plain selection test
> !image-2026-05-31-22-04-44-862.png|width=900!
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
