Hi,
Reading through the official installation guide, there are no limitations mentioned when using the embedded vPostgreSQL that comes with SRM 5.8.There is no information about scalability of this vPostgreSQL DB, or nothing that I could find until now.
The only issue I found is documented under kb.vmware.com/kb/2092565
If this setup doesn't have any limitations, why would I choose a SQL DB for SRM? My thought is moving forward to SRM 6.x and beyond, when VMware might come up with a completely different embedded DB and I'd be forced to go though a painful migration/upgrade process again (remembering the vCenter appliance embedded DBs, and that didn't work out that well).
I'm interested in your thoughts/suggestions about choosing the DB for SRM 5.8.