tidb dyn_pprof_unix 源码
tidb dyn_pprof_unix 代码
文件路径：/br/pkg/utils/dyn_pprof_unix.go
//go:build linux || darwin || freebsd || unix
// Copyright 2020 PingCAP, Inc. Licensed under Apache-2.0.
package utils
import (
"os"
"os/signal"
"syscall"
"github.com/pingcap/log"
tidbutils "github.com/pingcap/tidb/util"
"go.uber.org/zap"
)
const startPProfSignal = syscall.SIGUSR1
// StartDynamicPProfListener starts the listener that will enable pprof when received `startPProfSignal`.
func StartDynamicPProfListener(tls *tidbutils.TLS) {
signalChan := make(chan os.Signal, 1)
signal.Notify(signalChan, startPProfSignal)
go func() {
for sig := range signalChan {
if sig == startPProfSignal {
log.Info("signal received, starting pprof...", zap.Stringer("signal", sig))
if err := StartPProfListener("0.0.0.0:0", tls); err != nil {
log.Warn("failed to start pprof", zap.Error(err))
return
}
}
}
}()
}
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