Rui Fan created FLINK-30185:
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Summary: Provide the flame graph to the subtask level
Key: FLINK-30185
URL: https://issues.apache.org/jira/browse/FLINK-30185
Project: Flink
Issue Type: Improvement
Components: Runtime / REST, Runtime / Web Frontend
Reporter: Rui Fan
Fix For: 1.17.0
Attachments: image-2022-11-24-14-49-42-845.png
FLINK-13550 supported for CPU FlameGraphs in web UI.
As Flink doc mentioned:
https://nightlies.apache.org/flink/flink-docs-master/docs/ops/debugging/flame_graphs/#sampling-process
{code:java}
Note: Stack trace samples from all threads of an operator are combined
together. If a method call consumes 100% of the resources in one of the
parallel tasks but none in the others, the bottleneck might be obscured by
being averaged out.
There are plans to address this limitation in the future by providing “drill
down” visualizations to the task level. {code}
The flame graph at the subtask level is very useful when a small number of
subtasks are bottlenecked. So we should provide the flame graph to the subtask
level
!image-2022-11-24-14-49-42-845.png!
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