private final AtomicLong diskReadsTotalMs = new AtomicLong();
        private final AtomicLong readsFromCache = new AtomicLong();
        private final AtomicLong readsFromDisk = new AtomicLong();

        public void readFromDisk(long duration) {
            readsFromDisk.incrementAndGet();
            diskReadsTotalMs.addAndGet(duration);
        }

        public void readFromCache() {
            readsFromCache.incrementAndGet();