Deegue commented on PR #3756:
URL: https://github.com/apache/celeborn/pull/3756#issuecomment-4976555638

   > @Deegue, please discuss this in comments, instead of offline discussion. 
Otherwise, reviewers and others could not know the input of this change. BTW, 
please update the title and description according to updates.
   
   Thanks @SteNicholas, PR description updated. 
   
   Previously we discussed if it's necessary to add a rate limit and interval 
to call `getPinnedMemory` which iterates all pooled Netty allocators. Since it 
can add noticeable CPU/alloc overhead at this frequency after hitting the high 
watermark, we decided to add a cache for that.


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