Soft Memory Limit in Go 1.19
summary
Go 1.19 adds a soft memory limit via GOMEMLIMIT that caps when GC runs by taking the min(gomemlimit−nonheap, GOGC target) rather than letting GOGC alone grow the heap. GOGC=100 makes the next GC target roughly double current live heap so an app at 30 MB live would get a 60 MB target; if a container limit is 60 MB the GC would otherwise arrive too late and OOM. gomemlimit is compared after subtracting non‑heap runtime overhead so GC triggers earlier to respect container limits.
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