Hi everyone.
Where can I learn about what status of collection means. For example status=green/yellow/red. And how to manage them?
Thank you.

Hi, there are 3 possible statuses and they're described in the schema definition: https://qdrant.github.io/qdrant/redoc/index.html#tag/collections/operation/get_collection There is no way to manage them. It's just an indicator that something has possibly gone wrong, and if the collection is marked as red, then you probably need to check the logs.

So when I solve the problem described in optimizer_status then status of collection may be refreshed without restart or any additionla actions, right?

In many cases the restart of a node might be required. This is purely an indicator that some action has to be performed.