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https://issues.apache.org/jira/browse/CASSANDRA-16201?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Thomas Steinmaurer updated CASSANDRA-16201:
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Attachment: screenshot-1.png
> Cassandra 4.0 b2 - OOM / memory pressure due to object array pre-allocations
> in BatchUpdatesCollector
> -----------------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-16201
> URL: https://issues.apache.org/jira/browse/CASSANDRA-16201
> Project: Cassandra
> Issue Type: Bug
> Reporter: Thomas Steinmaurer
> Priority: Normal
> Attachments: screenshot-1.png
>
>
> In a Cas 2.1 / 3.0 / 3.11 / 4.0b2 comparison test with the same load profile,
> we see 4.0b2 going OOM from time to time. According to a heap dump, likely
> related to object array pre-allocations at the size of
> {{BatchUpdatesCollector.updatedRows}} per {{BTree}} although there is always
> only 1 {{BTreeRow}} in the {{BTree}}.
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