So, I've run without this third party cache purge module since I mentioned a custom build.

The server is still chewing through disk space and IO remains pegged to the wall (mix of the cache loader and new cache items). The cache loader seems unable to keep up -- I've never seen it actually delete anything. Through watching strace, it's just loading items. Does it not work on the queue until all items are loaded?

Is there anything I can do to try to alleviate this problem?