Is your Golang backend service down? Just use pprof.

Jan 8, 2025##golang #pprof #web30

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If you notice high CPU/memory usage or slow response times in your service, pprof can help identify problematic code. To use it, simply import the pprof library in your server code and start an HTTP server. After collecting data for 30 seconds by clicking on the profile, you can analyze it using the command `go tool pprof -http :8081 ./profile` and view the results at `http://localhost:8081/ui/`. You can also select the Flame Graph for a visual representation of the data.

If you find that the CPU/memory usage of the service is too high, or the request response is slow, and you want to know which piece of code is causing the problem, pprof is here to help you with that.

First, you need to import the pprof library in advance. It's simple; just add a few lines of code to the server code.

import (
	"net/http"
	_ "net/http/pprof"
)

func main() {
	go func() {
		http.ListenAndServe("localhost:8080", nil)
	}()
	// Main process
}

Click on the profile in the image below, and it will collect 30 seconds of data and save it to the profile file.

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Then run

go tool pprof -http :8081 ./profile

Open http://localhost:8081/ui/

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In the upper left corner, you can select the legendary Flame Graph (Flame Graph):

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