I've seen the purger recommended in different places:

• Best practices for implementing DB splitting #157 (comment)
• how to use zero copy #83 (comment)

The comments clearly state that you guys at rockset don't use it in prod. Fair enough. But if it is still recommended to use and has an option to turn it on, then it should at least do something.

Right now, it is both broken and not doing anything (see that commented code, also here).

Those TODOs are 7 years old. The option's documentation says that it is true by default but fortunately it is actually false.

For those reasons, I recommend deleting that option along the code because that's just dead code at this point.