hameizi commented on pull request #2916:
URL: https://github.com/apache/iceberg/pull/2916#issuecomment-891572481


   > I have another question. why `DEFAULT_RECORDS_NUM_THRESHOLD` is set to 
`100_000L`. Is there any experience about how to set this value?
   
   This value depend on the scene that whether your flink job will update one 
primary key frequently in one checkpoint and whether you have enough memory in 
flink job because these pos-delete is cached in memory before they are flush in 
pos-delete file. If in your sence you found there is too much pos-delete in one 
checkpoint inteval you can try config this configuration and add you flink job 
memory. At most sence 100_000 is enough. 


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