I have three tables each with about 20,000,000 rows having mostly the same row_keys. Now, when I use Concatenate (Optional in) I get a Heap-space error or the JVM crashes...
These are JVM options I am using (I believe they are rather genourous)
Do you have any suggestion on how to get this working? In the future I am expecting to have more like 100M rows per table...
(My solution would be to make the checking for uniq keys optional...)