SSIS - out of memory error again

Question

I have cca 25 databases which I need to consolidate into 1 database. First I tried to build a ssis package which would copy all data from each table into one place but then

Answer 1

You might run into memory issues if your Lookup transformation is set to Full cache. From what I have seen, the Merge Join performs better than Lookup transformation if the number of rows exceed 10 million.

Have a look at the following where I have explained the differences between Merge Join and Lookup transformation.

What are the differences between Merge Join and Lookup transformations in SSIS?