46e53b089a
In HBASE-8370 "Report data block cache hit rates apart from aggregate cache hit rates" discussion highlights small changes in caching percentage can make for large changes in cache contents; e.g. lots of data blocks may be getting evicited but because meta blocks -- index and blooms -- are staying in cache with high hit rates, a large data block eviction may show as a small change in overall cache percentage (e.g. from 99.99 to 99.11). Changes the getBlockCacheHitPercent from an int to a double. Also changes name of the jmx metric blockCountHitPercent to be blockCacheCountHitPercent instead. May be incompatible change. |
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