diff --git a/cmd/backup/main.go b/cmd/backup/main.go index 34211ee..f52183c 100644 --- a/cmd/backup/main.go +++ b/cmd/backup/main.go @@ -9,6 +9,7 @@ import ( "log/slog" "os" "os/signal" + "runtime" "syscall" "github.com/robfig/cron/v3" @@ -122,7 +123,7 @@ func runScript(c *Config) (err error) { return runErr } -func (c *command) runInForeground() error { +func (c *command) runInForeground(profileCronExpression string) error { cr := cron.New( cron.WithParser( cron.NewParser( @@ -189,6 +190,28 @@ func (c *command) runInForeground() error { } } + if profileCronExpression != "" { + if _, err := cr.AddFunc(profileCronExpression, func() { + memStats := runtime.MemStats{} + runtime.ReadMemStats(&memStats) + c.logger.Info( + "Collecting runtime information", + "num_goroutines", + runtime.NumGoroutine(), + "memory_heap_alloc", + formatBytes(memStats.HeapAlloc, false), + "memory_heap_inuse", + formatBytes(memStats.HeapInuse, false), + "memory_heap_sys", + formatBytes(memStats.HeapSys, false), + "memory_heap_objects", + memStats.HeapObjects, + ) + }); err != nil { + return fmt.Errorf("runInForeground: error adding profiling job: %w", err) + } + } + var quit = make(chan os.Signal, 1) signal.Notify(quit, syscall.SIGTERM, syscall.SIGINT) cr.Start() @@ -214,11 +237,12 @@ func (c *command) runAsCommand() error { func main() { foreground := flag.Bool("foreground", false, "run the tool in the foreground") + profile := flag.String("profile", "", "collect runtime metrics and log them periodically on the given cron expression") flag.Parse() c := newCommand() if *foreground { - c.must(c.runInForeground()) + c.must(c.runInForeground(*profile)) } else { c.must(c.runAsCommand()) }