The controller is the most common algorithm used to close the feedback loop. Feedback Control for Computer Systems [Book] - O'Reilly

): The lever the controller pulls (e.g., scaling server instances or adjusting cache size). The computer process being managed. Measured Output ( ): The actual current performance metric. 🛠️ The PID Controller: The Standard Algorithm

): The algorithm that calculates what change to apply based on the error. Control Input (

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