Set a soft memory limit with debug.SetMemoryLimit

In containerized environments, the Go runtime can benefit from knowing the memory budget. With Go 1.19+, debug.SetMemoryLimit lets you set a soft limit so the GC reacts more aggressively before the process gets killed by the OOM killer. I treat this as an operational tuning knob, not a magic fix: you still need to size caches and avoid leaks. The snippet below reads a byte value from GOMEMLIMIT_BYTES and applies it at startup. In production, I prefer using the standard GOMEMLIMIT env var when possible, but having an explicit hook can help when environments are inconsistent. The important part is observability: pair this with heap profiles and GC metrics so you understand the tradeoff between CPU and memory. Done carefully, this can improve stability for memory-constrained services.