Database memory limit

I want to create a test lab used by developers, one of the VMs will be running griddb as a database. I want to restrict the database engine memory usage by running "gs_paramconf -u admin/ --set storeMemoryLimit 4096MB" as described here https://griddb.net/en/docs/GridDB_OperationGuide.html . However, the change doesn't persist, and after some time, when I run "gs_paramconf -u admin/ --show storeMemoryLimit", the value is reseted to the default one. Could you please advise how should I proceed? Thank you