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https://issues.apache.org/jira/browse/CASSANDRA-21460?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18114050#comment-18114050
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Jon Haddad commented on CASSANDRA-21460:
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I isolated just the allocations from compaction and compared to bytes compacted:
|| Node || Bytes compacted || Total JVM alloc || Compaction subtree alloc ||
Compaction share || Compaction alloc / byte compacted ||
| db0 (iterator) | 25.8 GiB | 386.4 GiB | 264.5 GiB | 68.5% | 10.3 |
| db1 (iterator) | 34.0 GiB | 412.1 GiB | 284.8 GiB | 69.1% | 8.4 |
| db2 (cursor) | 23.0 GiB | 198.3 GiB | 77.0 GiB | 38.8% | 3.3 |
> Support BTI
> -----------
>
> Key: CASSANDRA-21460
> URL: https://issues.apache.org/jira/browse/CASSANDRA-21460
> Project: Apache Cassandra
> Issue Type: Sub-task
> Components: Local/Compaction
> Reporter: Jon Haddad
> Assignee: Jon Haddad
> Priority: Normal
> Attachments: Screenshot 2026-09-10 at 2.17.44 PM.png, Screenshot
> 2026-09-10 at 2.17.58 PM.png, Screenshot 2026-09-10 at 3.42.02 PM.png,
> Screenshot 2026-09-10 at 3.44.56 PM.png, Screenshot 2026-09-10 at 3.45.54
> PM.png
>
>
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