@Override
  public void clear(RegionVersionVector regionVersionVector, BucketRegion bucketRegion) {
    if (regionVersionVector != null) {
      return; // when concurrency checks are enabled the clear operation removes entries iteratively
    }

    synchronized (this) {
      if (bucketRegion != null) {
        getStatistics().decrementCounter(bucketRegion.getCounter());
        bucketRegion.resetCounter();
      } else {
        getStatistics().resetCounter();
      }
      initEmptyList();
    }
  }
Counter for the size of the LRU list
geode-core/src/main/java/org/apache/geode/internal/cache/eviction/AbstractEvictionList.java