this.metrics.blockCacheHitRatio.set(percent);
ratio = blockCache.getStats().getHitCachingRatio();
percent = (int) (ratio * 100);
this.metrics.blockCacheHitCachingRatio.set(percent);
// past N period block cache hit / hit caching ratios
cacheStats.rollMetricsPeriod();
ratio = cacheStats.getHitRatioPastNPeriods();
percent = (int) (ratio * 100);
this.metrics.blockCacheHitRatioPastNPeriods.set(percent);
ratio = cacheStats.getHitCachingRatioPastNPeriods();
percent = (int) (ratio * 100);