weizuo93 opened a new pull request #5665:
URL: https://github.com/apache/incubator-doris/pull/5665


   ## Proposed changes
   
    Add metrics (min, max, median, average, standard_deviation, P50, P75, P90, 
P95, P99, etc.) to show the distribution of tablets version count.
   
   ```
   # TYPE doris_be_tablet_version_num_distribution gauge
   doris_be_tablet_version_num_distribution{type="P99"} 11.000000
   doris_be_tablet_version_num_distribution{type="P95"} 11.000000
   doris_be_tablet_version_num_distribution{type="P90"} 11.000000
   doris_be_tablet_version_num_distribution{type="P75"} 10.833333
   doris_be_tablet_version_num_distribution{type="min"} 8
   doris_be_tablet_version_num_distribution{type="max"} 11
   doris_be_tablet_version_num_distribution{type="sum"} 970
   doris_be_tablet_version_num_distribution{type="median"} 8.857143
   doris_be_tablet_version_num_distribution{type="average"} 9.700000
   doris_be_tablet_version_num_distribution{type="standard_deviation"} 1.187434
   doris_be_tablet_version_num_distribution{type="P50"} 8.857143
   ```
   
   ## 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)
   - [x] 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)
   - [ ] Code refactor (Modify the code structure, format the code, etc...)
   


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