Exemple #1
0
func monitorFileDescriptor(done <-chan struct{}) {
	ticker := time.NewTicker(5 * time.Second)
	defer ticker.Stop()
	for {
		used, err := runtime.FDUsage()
		if err != nil {
			plog.Errorf("cannot monitor file descriptor usage (%v)", err)
			return
		}
		fileDescriptorUsed.Set(float64(used))
		limit, err := runtime.FDLimit()
		if err != nil {
			plog.Errorf("cannot monitor file descriptor usage (%v)", err)
			return
		}
		if used >= limit/5*4 {
			plog.Warningf("80%% of the file descriptor limit is used [used = %d, limit = %d]", used, limit)
		}
		select {
		case <-ticker.C:
		case <-done:
			return
		}
	}
}
Exemple #2
0
func init() {
	rand.Seed(time.Now().UnixNano())

	expvar.Publish(
		"file_descriptor_limit",
		expvar.Func(
			func() interface{} {
				n, _ := runtime.FDLimit()
				return n
			},
		),
	)
}