in hbase 0.98.10 class CacheConfig in line 417, we get lruCacheSize from heap conf and cachePercentage in line 450, when we use combineWithLru, we get a new lruCacheSize again from bucketCacheSize
lruCacheSize should have no relation with bucketCache, i think is not so property to get lruCacheSize from bucketCacheSize
