code: func (app *App) ReloadConfig() error {
  	app.Lock()
  	defer app.Unlock()
  
  	var err error
  	if err = app.configure(); err != nil {
  		return err
  	}
  
  	runtime.GOMAXPROCS(app.Config.Common.MaxCPU)
  
  	app.Cache.SetMaxSize(app.Config.Cache.MaxSize)
  	app.Cache.SetWriteStrategy(app.Config.Cache.WriteStrategy)
  	app.Cache.SetTagsEnabled(app.Config.Tags.Enabled)
  
  	if app.Persister != nil {
  		app.Persister.Stop()
  		app.Persister = nil
  	}
  
  	if app.Tags != nil {
  		app.Tags.Stop()
  		app.Tags = nil
  	}
  
  	app.startPersister()
  
  	if app.Collector != nil {
  		app.Collector.Stop()
  		app.Collector = nil
  	}
  
  	app.Collector = NewCollector(app)
  
  	return nil
  }
docs: // ReloadConfig reloads some settings from config