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Memory leak in Prefect server? #18605

@mattiamatrix

Description

@mattiamatrix

Bug summary

Hello Prefect! I think you can clearly see when I migrated to Prefect 3.

This is the memory of my Prefect server 3 running on an AWS ECS task. The instance has 2 vCPU and 4 GB memory.

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Version info

Version:             3.4.9
API version:         0.8.4
Python version:      3.12.8
Git commit:          1001c54f
Built:               Thu, Jul 17, 2025 09:48 PM
OS/Arch:             darwin/arm64
Server type:         server
Pydantic version:    2.11.7
Integrations:
  prefect-aws:       0.5.12
  prefect-gcp:       0.6.8
  prefect-sqlalchemy: 0.5.3

Additional context

I am sorry to say this, but Prefect 3 server is pretty unstable, and I am not sure if I would consider it production-ready. Prefect 2 was a gem in comparison.

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