How to Detect and Fix Memory Leaks in Go

Go does not have a built-in command to detect memory leaks because its garbage collector automatically reclaims unused memory; leaks only occur when references to objects are unintentionally retained. To identify these retained references, run your program with the -asan flag to enable the Address Sanitizer, which reports leaks at runtime.

go build -asan -o myapp main.go
./myapp

If you suspect a leak in a running service, generate a heap profile to see which objects are consuming the most memory and inspect the stack traces to find the source of the retention.

go tool pprof http://localhost:6060/debug/pprof/heap

In the pprof interactive shell, type top to list the largest memory consumers and web to visualize the call graph.

Go automatically cleans up memory you aren't using, so true memory leaks are rare and usually mean your code is holding onto data it doesn't need anymore. You can find these issues by running your program with special debugging tools that track memory usage or by taking a snapshot of your program's memory to see what is stuck there. Think of it like a housekeeper who cleans up everything except the items you are still holding in your hands.