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https://issues.apache.org/jira/browse/CASSANDRA-21363?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dmitry Konstantinov updated CASSANDRA-21363:
--------------------------------------------
Description:
BTreeSearchIterator - 2.65% of allocations within
org.apache.cassandra.db.rows.AbstractRow#hasLiveData
We can use BTreeRow#minLocalDeletionTime to avoid iteration over cells in some
scenarios, like:
in case of a non-empty row without tombstones we can just check:
{code}
if (minLocalDeletionTime == Cell.MAX_DELETION_TIME)
return !BTree.isEmpty(btree);
{code}
and still the iteration
!image-2026-05-10-17-14-07-547.png|width=900!
was:
BTreeSearchIterator - 2.65% of allocations within
org.apache.cassandra.db.rows.AbstractRow#hasLiveData
We can use BTreeRow#minLocalDeletionTime to avoid iteration over cells in some
scenarios, like: if (minLocalDeletionTime == Cell.MAX_DELETION_TIME)
return !BTree.isEmpty(btree);
!image-2026-05-10-17-14-07-547.png|width=900!
> BTreeRow#hasLiveData: Avoid Cell iteration if there are no tombstones in a row
> ------------------------------------------------------------------------------
>
> Key: CASSANDRA-21363
> URL: https://issues.apache.org/jira/browse/CASSANDRA-21363
> Project: Apache Cassandra
> Issue Type: Improvement
> Components: Local/Other
> Reporter: Dmitry Konstantinov
> Assignee: Dmitry Konstantinov
> Priority: Normal
> Attachments: image-2026-05-10-17-14-07-547.png
>
>
> BTreeSearchIterator - 2.65% of allocations within
> org.apache.cassandra.db.rows.AbstractRow#hasLiveData
> We can use BTreeRow#minLocalDeletionTime to avoid iteration over cells in
> some scenarios, like:
> in case of a non-empty row without tombstones we can just check:
> {code}
> if (minLocalDeletionTime == Cell.MAX_DELETION_TIME)
> return !BTree.isEmpty(btree);
> {code}
> and still the iteration
> !image-2026-05-10-17-14-07-547.png|width=900!
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