crossoverJie opened a new issue, #21861:
URL: https://github.com/apache/pulsar/issues/21861

   ### Search before asking
   
   - [X] I searched in the [issues](https://github.com/apache/pulsar/issues) 
and found nothing similar.
   
   
   ### Motivation
   
   
![image](https://github.com/apache/pulsar/assets/15684156/86460935-7dbf-4731-949c-0fa071924d0f)
   We have a few `bk` node disk occupation for a long time at 95%
   
   
   
   
   
   
   ### Solution
   
   After scanning, we found that the value of the `majorCompactionThreshold` 
0.5, not 0.8 in the bookkeeper repo.
   
   https://github.com/apache/bookkeeper/blob/master/conf/bk_server.conf#L529
   
   `majorCompactionThreshold=0.5` is less likely to trigger the GC, and whether 
to change the default to `0.8` to be consistent with the bookkeeper.
   
   
   
   
   
   
   ### Alternatives
   
   _No response_
   
   ### Anything else?
   
   _No response_
   
   ### Are you willing to submit a PR?
   
   - [X] I'm willing to submit a PR!


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