[Improvement] set display level for graph

[nayutah]

Is your improvement request related to a problem? Please describe.
1, set display level for graph, or set maxnodes to avoid nodes overflow
2, set a default display level, user can modify it to a proper value

If this is a new function, please describe the motivation and goals.
A clear and concise description of why you want to happen, link the design doc if possible

Describe the solution you'd like
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Describe alternatives you've considered
A clear and concise description of any alternative solutions or functions you've considered.

Additional context
Add any other context or screenshots about the improvement request here.

[github-actions]

This issue has been marked as stale because it has been open for 30 days with no activity