BsoBird opened a new issue, #7514:
URL: https://github.com/apache/iceberg/issues/7514

   ### Query engine
   
   spark 3.3.2
   iceberg 1.2.1
   
   ### Question
   
   I have a data table with nearly 40 billion data and nearly 10TB data size.
   I want to MERGE the incremental data into the base data table every day, the 
daily incremental data is close to 3000W.
   I have tested three options: no partitioned table, year-month partitioned 
table, and tenant partitioned table. The efficiency of data MERGE is poor.
   Currently, the time required to perform a MERGE is close to 3-5 hours.And 
the memory is often low, causing tasks to fail.
   Executor's memory is set to 16G and uses dynamic resources.
   How can I quickly MERGE incremental data into the base data table?


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