Tag
feedback-control
- Jan 7, 2026 Autoscaling as a Feedback Loop: Gain, Lag, and Why It Oscillates How a replica controller turns a metric into a desired count, why the control law is proportional rather than predictive, and how sampling lag and stabilisation windows prevent or cause oscillation. virtualization
- Dec 13, 2024 Adaptive Per-Host Rate Control from Latency and Error Signals How a crawler can raise and lower its request rate per host using response latency and rejection codes, and why the control loop is asymmetric and needs damping. information retrieval
- Dec 12, 2023 Admission Control for Background Work: Keeping Scans Off the Critical Path Why a fixed batch size cannot protect foreground latency, how a feedback controller turns saturation signals into a work rate, and where the loop becomes unstable. distributed systems
- Jul 11, 2023 Adaptive Sampling: Feedback Control over Span Volume How a sampler adjusts its rate from observed traffic instead of a fixed configuration, why per-operation rates are needed, and the statistical damage caused by a rate that keeps changing. observability