Because LocalDB is based on the SQL Server Express engine, it shares the same core resource limits. Limit / Capability Max Database Size 10 GB per database Limited to 1 socket or 4 cores Memory (RAM) 1 GB for the buffer pool Service Dependency None; starts as a process on demand Programmability
For a completely self-contained environment that includes the OS, SQL Server, and management tools (SSMS), a Virtual Machine (VM) is the most robust option. Keep the VM on an external SSD. ms sql server express portable
Avoid messing with the host’s registry or library versions. Because LocalDB is based on the SQL Server
This allows your application to carry its database file (e.g., Database.mdf ) in its own folder. Isolation: Avoid messing with the host’s registry or library versions
: SQL Server Express is limited to 10GB per database.
1. The Best "Near-Portable" Option: SQL Server Express LocalDB