memory deallocation issue

after serving the request, the instance is not de allocating the used up memory. the graph in the invocation matrices remains flatline after peaking when the request is completed? any idea why it's happening and how to counter

No file, notebook, test, or entry point is identified; begin by locating the SageMaker serving example that produced the attached invocation-metrics graph and reproduce the request. Determine whether the flatline is expected managed-instance behavior or an application memory issue, then document the evidence and a verified countermeasure.

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