> I am aware of the requirements to use atomic updates, but as I understood, > those would not have a big impact on performance and only a slight increase > in index size?
AFAIK there won't be a difference in index size between atomic updates and full updates, as the end result is the same. But you will probably see a performance increase because you'll only have to send 40000 boolean flags instead of 40000 full documents. Using atomic updates sounds like a good idea to me. - Bram
