Why Our C++ Inventory Service Restarted Every Night: Memory Management Lessons

Our company once operated a real‑time inventory query system written in C++ across 30 machines. Although the service was relatively stable, we scheduled a batch restart of the machines every day at 3 am to release memory.

C++ provides high performance and fine‑grained resource control, but it also requires developers to manage memory manually. Even a small oversight can cause memory leaks that are difficult to detect, so the team adopted the blunt approach of periodic restarts. The practice persisted until the service was later rewritten in Java, at which point the nightly restarts were eliminated.

This situation exemplifies a common issue: when a programming language places excessive resource‑management responsibility on developers, they end up spending significant effort handling memory rather than focusing on business logic. This is why memory‑safe languages such as Java, C#, Go, and Rust have gained popularity in recent years.

The article does not claim that C++ is inferior; it acknowledges that C++ remains indispensable for scenarios demanding extreme performance and precise resource control. However, it raises a deeper question: if a business requirement can be satisfied with two different languages, why choose the one that makes programmers more likely to introduce bugs?

Historically, we have praised performance, flexibility, and resource control as advantages of certain languages, while overlooking the engineering benefit of reducing programmer error. Good tools should enable not only experts to excel but also ordinary developers to avoid low‑level mistakes, because preventing a single pitfall directly boosts productivity.