How CDS is storing resolved results

When "store-result" : false, nothing will be saved to CDS database. But CDS still seems to store resolution results to memory? How it works? When I run golden demo, as part of that e.g. prefix-id will get resolved first in resource-assignment. https://github.com/onap/ccsdk-cds/blob/master/components/model-catalog/blueprint-model/test-blueprint/golden/Templates/vf-module-1-mapping.json#L40 with default value 6. Now if I want to use different prefix-id, I run resource-assignment again and give prefix-id as a input parameter in the request payload. After than call, CDS have stored somewhere the new value (different than 6) and if I run now config-assign the prefix-id will get that new value (and it's not given as input param).