@stephenb I never worked at CoreLogic, but I've worked with the company a number of times on various real estate projects. Your name does sound familiar.
The issue with space... There is about 40% of space remaining.
And for each node (last one being the master):
Assuming that is the case, I should still be able to clean up deleted records from an index that only has a few. For example, index newsarticles_web01_dev_637044237457830355 has 7833 indexed documents and 3 deleted ones.
Surely, I should be able to issue a forcemerge command on this index:
POST newsarticles_web01_dev_637044237457830355/_forcemerge?only_expunge_deletes=true
But it results in a timeout as well and nothing happens.