Go pprof

Internal

• Go Engineering

Reading List

Read these and link those wroth it from External:

• https://go.dev/blog/pprof
• https://pkg.go.dev/net/http/pprof
• https://github.com/google/pprof
• https://dave.cheney.net/high-performance-go-workshop/sydney-2019.html
• https://jvns.ca/blog/2017/09/24/profiling-go-with-pprof/
• Official pprof User Manual: https://github.com/google/pprof/blob/main/doc/README.md

Overview

Go comes with built-in frameworks for testing and profiling.

Subjects

• Concepts
• Operations

Profile a Running Process

Assuming that your local 127.0.0.1 address is aliased to "localhost.somedomain.com" in /etc/hosts and the certificates are issued for "localhost.somedomain.com", set CERT_PATH to the directory that contains and and:

export CERT_PATH=/Users/ovidiu/some-project/config
go tool pprof -http 127.0.0.1:8080 -tls_cert ${CERT_PATH}/localhost.somedomain.com.chain.pem -tls_key ${CERT_PATH}/localhost.somedomain.com.key.pem https://localhost.somedomain.com:8443

Inspect a Running Process with a Browser

Go to https://localhost.somedomain.com:8443/debug/pprof/

Dump the Goroutines into a Text File

curl -k https://localhost:8443/debug/pprof/goroutine?debug=2

Replace the port with the actual HTTP(S) port the process is listening on.