code: protected void reportCachePerformance ()
      {
          if (/* Log.getLevel() != Log.log.DEBUG || */
              _cacheStatThrottle.throttleOp()) {
              return;
          }
  
          // compute our estimated memory usage
          long size = 0;
  
          int[] eff = null;
          synchronized (_ccache) {
              Iterator<CacheRecord> iter = _ccache.values().iterator();
              while (iter.hasNext()) {
                  size += iter.next().getEstimatedMemoryUsage();
              }
              eff = _ccache.getTrackedEffectiveness();
          }
          log.info("ImageManager LRU", "mem", ((size / 1024) + "k"), "size", _ccache.size(),
              "hits", eff[0], "misses", eff[1], "totalKeys", _keySet.size());
      }
docs: Reports statistics detailing the image manager cache performance and the current size of the
  cached images.