zeroshade commented on issue #374:
URL: https://github.com/apache/arrow-go/issues/374#issuecomment-2867846354

   Can you share the column metadata output that says it is 1GB? Is it perhaps 
referring to the uncompressed size? `RowGroupTotalBytesWritten()` will use the 
compressed size of the columns. 
   
   Much of this will depend on the actual size of the records themselves that 
you are trying to write, since you only start a new record after you write 
something that exceeds your desired size. If you get close to the 
`maxRowGroupSize` and then write a very large record, you'll exceed the max by 
a lot. 


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