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https://issues.apache.org/jira/browse/CASSANDRA-20310?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dmitry Konstantinov updated CASSANDRA-20310:
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Priority: Low (was: Normal)
> Analyze page faults for jmalloc allocated memory
> ------------------------------------------------
>
> Key: CASSANDRA-20310
> URL: https://issues.apache.org/jira/browse/CASSANDRA-20310
> Project: Apache Cassandra
> Issue Type: Improvement
> Components: Local/Memtable
> Reporter: Dmitry Konstantinov
> Assignee: Dmitry Konstantinov
> Priority: Low
> Fix For: 5.x
>
> Attachments: image-2025-02-09-10-37-20-057.png,
> image-2025-02-09-10-37-37-196.png
>
>
> While assessing another performance question I have noticed suspicious minor
> page fault reported in async profiler cpu profile for access to native memory
> in NativeCell and NativeClustering:
> !image-2025-02-09-10-37-20-057.png|width=300!
> !image-2025-02-09-10-37-37-196.png|width=300!
> It makes sense to check how jmalloc reuses memory in case of memtables
> consumption pattern and maybe to play with dirty_decay_ms/muzzy_decay_ms
> values to reduce page faults rate..
> Related links:
> [https://github.com/jemalloc/jemalloc/wiki/getting-started]
> [https://github.com/jemalloc/jemalloc/blob/dev/TUNING.md]
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