If you are using G2 version 2021.1, you may encounter an issue triggered by a GDA error where the memory keeps on increasing. This memory leak issue is caused because some objects are created but not deleted if an error occurs in the procedure.
This issue has been fixed in the latest version of G2: 2021.2, which is available for download. The release notes can be found on this page: Announcing Gensym G2 2021.2 Standard and Enterprise Edition General Availability. Please contact support if the problem persists even in the 2021.2 version.