measureとexpvar

[c-bata]

measureでボトルネックを探すついでに、netdataで見るためのexpvar用メトリクスを https://github.com/c-bata/measure に追加済み。 measure用のコードを書けばそのままnetdataで見れる

package main
​
import (
    "fmt"
    "log"
    "net/http"
    "time"
​
    "github.com/c-bata/measure"
​
    _ "expvar"
    _ "net/http/pprof"
)
​
func main() {
    // measure csv
    go func() {
        log.Println(http.ListenAndServe("0.0.0.0:6070", &measure.Handler{}))
    }()
    // default servemux
    go func() {
        log.Println(http.ListenAndServe("0.0.0.0:6060", nil))
    }()
​
    err := http.ListenAndServe("0.0.0.0:8080", &hello{})
    if err != nil {
        panic(err)
    }
}
​
type hello struct{}
​
func (h *hello) ServeHTTP(w http.ResponseWriter, r *http.Request) {
    defer measure.Start(r.URL.Path).Stop()
    time.Sleep(100 * time.Millisecond)
    _, _ = fmt.Fprintf(w, "Hello, %s!", r.URL.Path)
}

[c-bata]

measureの結果ここに貼っていく予定 https://docs.google.com/spreadsheets/d/1hQAGJfNjouwYn0dBY4MMMWAsYk60ECeOm5A7RI01Y4Q/edit?usp=sharing