[Core] How to reduce Plasma memory

First of all, I don’t know much about Plasma. After reading Ray’s documentation, I found that it can share memory by ray.put and ray.get.
But in my work, I don’t use much memory in Plasma while its capacity is 114489.0 MiB (I found this in dashboard). My total RAM is 376.5 GiB and I am suffering from too much memory usage.

So I am wondering whether Plasma takes up some memory even it don’t use it?
If it is, can I limite Plasma’s memory usage?

Thanks in advance!

You can start ray with ray start --head -object-store-memory=[bytes]. Also note that ray wont’ use the memory for the plasma store if you don’t have any object.

Thanks for your reply!