tsreaper opened a new pull request, #9185:
URL: https://github.com/apache/paimon/pull/9185

   ### Purpose
   
   #8993 fixes level 1 inflation in forced level 0 compaction. However, this 
problem still exists in normal compaction.
   
   For example when num-levels = 6 and num-sorted-run.compaction-trigger = 8 
and there are 4 level 0 files, it is possible that total level 0 size does not 
exceed level 1 size, so only level 0 is picked and is merged with level 1, 
causing the level 1 size to increase indefinitely.
   
   ### Tests
   
   * `UniversalCompactionTest#testFileNumCompactionConsidersLevel2`.
   


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