core/src/main/java/com/orientechnologies/orient/core/storage/impl/local/statistic/OPerformanceStatisticManager.java
public void stopMonitoring() {
    switchLock.acquireWriteLock();
    try {
      enabled = false;

      final PerformanceCountersHolder countersHolder = ComponentType.GENERAL.newCountersHolder();
      final Map<String, PerformanceCountersHolder> componentCountersHolder = new HashMap<>();

      WritCacheCountersHolder writCacheCountersHolder = deadThreadsStatistic.writCacheCountersHolder;
      StorageCountersHolder storageCountersHolder = deadThreadsStatistic.storageCountersHolder;
      WALCountersHolder walCountersHolder = deadThreadsStatistic.walCountersHolder;

      deadThreadsStatistic.countersHolder.pushData(countersHolder);
      componentCountersHolder.putAll(deadThreadsStatistic.countersByComponents);

      deadThreadsStatistic = null;

      for (OSessionStoragePerformanceStatistic statistic : statistics.values()) {
        statistic.pushSystemCounters(countersHolder);
        statistic.pushComponentCounters(componentCountersHolder);
        writCacheCountersHolder = statistic.pushWriteCacheCounters(writCacheCountersHolder);
        storageCountersHolder = statistic.pushStorageCounters(storageCountersHolder);
        walCountersHolder = statistic.pushWALCounters(walCountersHolder);
      }

      statistics.clear();

      postMeasurementStatistic = new ImmutableStatistic(countersHolder, componentCountersHolder, writCacheCountersHolder,
          storageCountersHolder, walCountersHolder);
    } finally {
      switchLock.releaseWriteLock();
    }
  }
public void stopMonitoring() {
    switchLock.acquireWriteLock();
    try {
      enabled = false;

      final PerformanceCountersHolder countersHolder = ComponentType.GENERAL.newCountersHolder();
      final Map<String, PerformanceCountersHolder> componentCountersHolder = new HashMap<>();

      WritCacheCountersHolder writCacheCountersHolder = deadThreadsStatistic.writCacheCountersHolder;
      StorageCountersHolder storageCountersHolder = deadThreadsStatistic.storageCountersHolder;
      WALCountersHolder walCountersHolder = deadThreadsStatistic.walCountersHolder;

      deadThreadsStatistic.countersHolder.pushData(countersHolder);
      componentCountersHolder.putAll(deadThreadsStatistic.countersByComponents);

      deadThreadsStatistic = null;

      for (OSessionStoragePerformanceStatistic statistic : statistics.values()) {
        statistic.pushSystemCounters(countersHolder);
        statistic.pushComponentCounters(componentCountersHolder);
        writCacheCountersHolder = statistic.pushWriteCacheCounters(writCacheCountersHolder);
        storageCountersHolder = statistic.pushStorageCounters(storageCountersHolder);
        walCountersHolder = statistic.pushWALCounters(walCountersHolder);
      }

      statistics.clear();

      postMeasurementStatistic = new ImmutableStatistic(countersHolder, componentCountersHolder, writCacheCountersHolder,
          storageCountersHolder, walCountersHolder);
    } finally {
      switchLock.releaseWriteLock();
    }
  }
Stops monitoring of performance statistic for whole system.