https://go.dev/blog/pprof https://pkg.go.dev/net/http/pprof

配置监听端口

package main
import (
    "flag"
    "log"
    "net/http"
    _ "net/http/pprof"
    "os"
    "os/signal"
    "syscall"
)
func init() {
    // ... 
}
func main() {
    // ...
    go func() {
        log.Println(http.ListenAndServe("localhost:10001", nil))
    }()
    // ...
}

使用方式

1、pprof工具查看heap profile：

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

2、查看 30 秒的 CPU 配置文件：

go tool pprof http://localhost:6060/debug/pprof/profile?seconds=30

3、程序中调用 runtime.SetBlockProfileRate 后查看 goroutine 阻塞配置文件：

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

4、您的程序中调用 runtime.SetMutexProfileFraction 后查看竞争互斥锁的持有者：

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

5、收集15秒执行跟踪：

wget -O trace.out http://localhost:6060/debug/pprof/trace?seconds=15
go tool trace trace.out

通过工具查看生产的配置文件

go tool pprof -http=:10081 profile.xxx.gz

例子

path:/opt/homebrew/Cellar/go@1.16/1.16.10/libexec/src/net/http/pprof/pprof_test.go

{"/debug/pprof/<script>scripty<script>", Index, http.StatusNotFound, "text/plain; charset=utf-8", "", []byte("Unknown profile\n")},
{"/debug/pprof/heap", Index, http.StatusOK, "application/octet-stream", `attachment; filename="heap"`, nil},
{"/debug/pprof/heap?debug=1", Index, http.StatusOK, "text/plain; charset=utf-8", "", nil},
{"/debug/pprof/cmdline", Cmdline, http.StatusOK, "text/plain; charset=utf-8", "", nil},
{"/debug/pprof/profile?seconds=1", Profile, http.StatusOK, "application/octet-stream", `attachment; filename="profile"`, nil},
{"/debug/pprof/symbol", Symbol, http.StatusOK, "text/plain; charset=utf-8", "", nil},
{"/debug/pprof/trace", Trace, http.StatusOK, "application/octet-stream", `attachment; filename="trace"`, nil},
{"/debug/pprof/mutex", Index, http.StatusOK, "application/octet-stream", `attachment; filename="mutex"`, nil},
{"/debug/pprof/block?seconds=1", Index, http.StatusOK, "application/octet-stream", `attachment; filename="block-delta"`, nil},
{"/debug/pprof/goroutine?seconds=1", Index, http.StatusOK, "application/octet-stream", `attachment; filename="goroutine-delta"`, nil},
{"/debug/pprof/", Index, http.StatusOK, "text/html; charset=utf-8", "", []byte("Types of profiles available:")},