that’s a lot!
i’ve already dedicated one separate instance just to RWI distribution: when there’s a several tens of gb on a primary instance, i move the RWI to distribution instance, to keep the RWIs slender on the primary one. the latter needs much more RAM as well.
that’s a workaround, i suspect kelondro for being bit inefficient and possibly could be tuned.
maybe you could ommit/reduce the RWIs while experimenting…