// Continuously prints stats on the database at given intervals.
func printStats(db *bolt.DB, interval time.Duration) {
var prevStats = db.Stats()
var encoder = json.NewEncoder(os.Stdout)
for {
// Wait for the stats interval.
time.Sleep(interval)
// Retrieve new stats and find difference from previous iteration.
var stats = db.Stats()
var diff = stats.Sub(&prevStats)
// Print as JSON to STDOUT.
if err := encoder.Encode(diff); err != nil {
fatal(err)
}
// Save stats for next iteration.
prevStats = stats
}
}
