WorksOnMyCluster

Debugging Memory Leaks in Go Runtime

A step-by-step SRE guide to diagnosing and mitigating high memory consumption inside compiled Go binaries using pprof heap visualization tools.

mid 25 min read 2 sections
#go#profiling#debugging#memory-management

When diagnosing high memory consumption inside Go binaries, the first step is to analyze pprof heap allocations. The runtime garbage collector (GC) works continuously, but custom heap allocations can stay pinned in memory if references are held indefinitely.

Heap Profiling

You can inspect active memory allocations by pulling a heap profile via the standard HTTP endpoint:

$ go tool pprof -http=:8080 http://localhost/debug/pprof/heap

Analyzing the Output

Look specifically for inuse_space allocations. This metric represents memory that has been allocated and is still in use by active routines.

[!TIP] Run heap profiles before and after garbage collection passes using debug environment variables to isolate long-lived objects.

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