The Mixed Reality Forums here are no longer being used or maintained.
There are a few other places we would like to direct you to for support, both from Microsoft and from the community.
The first way we want to connect with you is our mixed reality developer program, which you can sign up for at https://aka.ms/IWantMR.
For technical questions, please use Stack Overflow, and tag your questions using either hololens or windows-mixed-reality.
If you want to join in discussions, please do so in the HoloDevelopers Slack, which you can join by going to https://aka.ms/holodevelopers, or in our Microsoft Tech Communities forums at https://techcommunity.microsoft.com/t5/mixed-reality/ct-p/MicrosoftMixedReality.
And always feel free to hit us up on Twitter @MxdRealityDev.
How large is the cache of HoloLens Spatial Map?
If I understand correctly how HoloLens Spatial map works, when HoloLens is on your head, it constantly scan the environment and build the spatial map. In Hololens Windows Home(the default view of Hololens), You may place objects in the environment, what happens in the background is that it creates WorldAnchor and attache the object on it. You may walk quit far away or go to somewhere else and when you are back you can find the object still there, because the spatial map of the area is already cached inside HoloLens. The question here is: HOW LARGE is the cache? Is it so that when the cache is full, the new map will replace the old ones, in that case, your anchors will be lost and your objects will NOT be visible there?