code: private void createReadCaches() {
  		recalculateSizeReadCaches();
  		if (log.isDebugEnabled()) {
  			log.debug(this.getClass().getName() + "::createReadCaches readCacheInternal=" + readCacheInternal
  					+ " readCacheLeaf=" + readCacheLeaf);
  		}
  		cacheInternalNodes = createCacheLRUlinked(readCacheInternal);
  		cacheLeafNodes = createCacheLRUlinked(readCacheLeaf);
  	}
docs: Create read caches