[HBASE-28011] The logStats about LruBlockCache is not accurate

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.4.13
• Fix Version/s: 2.6.0, 2.4.18, 2.5.6, 3.0.0-beta-1
• Component/s: BlockCache

Environment

Centos 7.6

HBase 2.4.13

• Hadoop Flags: Reviewed
• Assignee: guluo
• Reporter: guluo
• Created: 07/Aug/23 14:15
• Updated: 11/Aug/23 02:02
• Resolved: 09/Aug/23 17:53

Description

LruBlockCache.logStats would print info, as follow:

//代码占位符
INFO  [LruBlockCacheStatsExecutor] hfile.LruBlockCache: totalSize=2.42 MB, freeSize=3.20 GB, max=3.20 GB, blockCount=14, accesses=31200, hits=31164, hitRatio=99.88%, , cachingAccesses=31179, cachingHits=31156, cachingHitsRatio=99.93%, evictions=426355, evicted=0, evictedPerRun=0.0 

I think the description about totalSize=2.42 MB is not accurate, It actually represents the used size of BlockCache.

Issue Links

• links to: GitHub Pull Request #5344