We are also thinking of the same.. but the database is of very less size and complete backup of the database itself is not taking 15 min.
Do you know what these transactions are? why would it cause delay in startup?
Appreciate your help on understanding this step.
Do you know what these transactions are?
From the link I provided - "Performance Management Architect creates transactions in the Performance Management Architect database. This database is automatically created during installation and configuration. Since Performance Management Architect does not delete these artifacts, the database size can increase over time. The Performance Management Architect Transaction History Purge Utility enables you to remove transactions from the database to reduce database size."
Whether this helps your situation I can't say but it is worth investigating.
You also say that EPMA is installed on a VM, have you checked with the team that manages the VM infrastructure to see whether there is any resource connection that be causing severe performance degradation.