You can drop your mergeFactor to 2 and then run expungeDeletes?
This will make the operation take longer but (assuming you have > 3
segments in your index) should use less transient disk space.
You could also make a custom merge policy, that expunges one segment
at a time (even slower but even le
Due to some emergency maintenance I needed to run delete on a large
number of documents in a 200Gb index.
The problem is that it's taking an inordinately long amount of time (2+
hours so far and counting) and is steadily eating up disk space -
presumably up to 2x index size which is getting awf
