Just to get an idea of how people use large lists like this, can I ask a few questions? These are in no way meant to question how you use Cachly, I just want to better understand use cases.
Why do you need to keep 11,000 caches up to date?
Why do you need to keep all 11,000 caches on a device that could be lost?
What data in these caches is most important to have updated?
In Geosphere were you just updating status of the 11,000 caches?
Thanks!