Kikyou1997 opened a new pull request, #18460:
URL: https://github.com/apache/doris/pull/18460

   # Proposed changes
   
   Load the most recently used stats as FE booted.
   
   StatsCacheLoader will record the column(tblid-idxid-colname) it loaded to a 
map. This PR add a shutdown hook to FE so that we could writes the records in 
map to the metadata.
   
   When booting, Stats of columns that recorded previously would be loaded by a 
single thread.
   
   NOTE
   
   This PR add new operation type of log, so the metadata is not backforward 
compatitable, once user or dev run their FE on the code of this version they 
cannot rollback to previous FE version.
   
   This PR modified the 
   
   ## Problem summary
   
   Describe your changes.
   
   ## Checklist(Required)
   
   * [ ] Does it affect the original behavior
   * [ ] Has unit tests been added
   * [ ] Has document been added or modified
   * [ ] Does it need to update dependencies
   * [ ] Is this PR support rollback (If NO, please explain WHY)
   
   ## Further comments
   
   If this is a relatively large or complex change, kick off the discussion at 
[d...@doris.apache.org](mailto:d...@doris.apache.org) by explaining why you 
chose the solution you did and what alternatives you considered, etc...
   
   


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