[GitHub] [hudi] harsh1231 edited a comment on issue #4745: [SUPPORT] Bulk Insert into COW table slow

[GitBox <gi...@apache.org>]

harsh1231 edited a comment on issue #4745:
URL: https://github.com/apache/hudi/issues/4745#issuecomment-1033341751


   @harishraju-govindaraju  Can you check https://hudi.apache.org/docs/0.5.0/admin_guide/
   `* stats filesizes - File Sizes. Display summary stats on sizes of files
   * stats wa - Write Amplification. Ratio of how many records were upserted to how many records were actually written
   `
   
   Also can you share  stage level spark ui screen shots 
   Performance of upsert operation depends on how much underlying dataset overlaps with incoming dataset 
   Looking at job overall stats -> 792 tasks , check if there are small files created during initial load of data . 
   `hoodie.copyonwrite.record.size.estimate=100` set this during first load of data if you have large number of small files 
   
   
   


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