Dmitry Konstantinov created CASSANDRA-20310:
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Summary: 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
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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