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Table Of Contents
Deep Learning with C++
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Once a model moves into production, the goal shifts from strong offline accuracy to stable real-world behavior. The key question is no longer only whether it performs well on a held-out test set, but also whether it remains fast, reliable, cost-efficient, and observable under live traffic. Monitoring is what makes those expectations measurable.
In this chapter, we treat the model and serving stack as a live production system. We define the core Service Level Indicators (SLIs) for quality, latency, and resource usage, and show how to instrument them directly in C++ with low overhead. We also distinguish monitoring, which focuses on the small set of signals you actively track and alert on, from observability, which provides the logs, metrics, and traces needed to explain those signals when they change.
Because production labels often arrive late, this chapter also covers how to monitor online quality when ground truth is delayed. We introduce leading...