elek edited a comment on issue #665: HDDS-3160. Disable index and filter block 
cache for RocksDB.
URL: https://github.com/apache/hadoop-ozone/pull/665#issuecomment-603812461
 
 
   > I mean do we see better BLOCK_CACHE_DATA_HIT 
   
   @xiaoyuyao Good questions, I checked it and saved the screenshot to have it 
in this PR (FTR). And the answer is yes: 
   
   
![image](https://user-images.githubusercontent.com/170549/77536294-69f77500-6e9c-11ea-86ff-842be92479b9.png)
   
    * Top middle: the number of key allocations. First test without the patch 
(orange) second test with the patch (green). You can see the problem 
(performance drop) without the patch after 10 million keys
    * bottom middle: block cache hit: you can see that after the problem it's 
dropped but not with the patch 

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