> I see from your other messages that these indexes all live on the same > machine. > You're almost certainly I/O bound, because you don't have enough memory for > the > OS to cache your index files. With 100GB of total index size, you'll get best > results with between 64GB and 128GB of total RAM.
Is that a general rule of thumb? That it is best to have about the same amount of RAM as the size of your index? So, with a 5GB index, I should have between 4GB and 8GB of RAM dedicated to solr?