YutSean commented on a change in pull request #3473:
URL: https://github.com/apache/hbase/pull/3473#discussion_r669247097
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File path:
hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/CombinedBlockCache.java
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@@ -78,7 +78,13 @@ public Cacheable getBlock(BlockCacheKey cacheKey, boolean
caching,
// we end up calling l2Cache.getBlock.
// We are not in a position to exactly look at LRU cache or BC as
BlockType may not be getting
// passed always.
- return l1Cache.containsBlock(cacheKey)?
+ boolean existInL1 = l1Cache.containsBlock(cacheKey);
+ if (!existInL1 && updateCacheMetrics) {
+ // If the block does not exist in L1, the containsBlock should be
counted as one miss.
+ l1Cache.getStats().miss(false, cacheKey.isPrimary(),
cacheKey.getBlockType());
+ }
+
+ return existInL1?
Review comment:
line 88 & 89 are not changed
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