weizuo93 opened a new pull request #5618:
URL: https://github.com/apache/incubator-doris/pull/5618


   ## Proposed changes
   
   We hope that `cumulative compaction` can be implemented as soon as possible, 
but `base compaction` tasks are likely to  execute for a long time and occupy 
most of the threads in thread pool, which may result in high CPU load. 
   
   This patch submits `cumulative compaction` and `base compaction` into 
separate thread pool. So we have more flexibility to adjust the execution of 
`cumulative compaction` and `base compaction`according to the status of cluster.
   ## Types of changes
   
   What types of changes does your code introduce to Doris?
   _Put an `x` in the boxes that apply_
   
   - [ ] Bugfix (non-breaking change which fixes an issue)
   - [ ] New feature (non-breaking change which adds functionality)
   - [ ] Breaking change (fix or feature that would cause existing 
functionality to not work as expected)
   - [ ] Documentation Update (if none of the other choices apply)
   - [x] Code refactor (Modify the code structure, format the code, etc...)
   


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