Is there any information on limits for SuiteCommerce? e.g. how many customers at once, size of database, how many orders at once.

We publish limits in appropriate places if we think it necessary, but we don't publicly document a master list of all limits. To answer those specific questions, you may be referring to our tier lists: https://docs.oracle.com/en/cloud/saas/netsuite/ns-online-help/subsect_159162378384.html

Thanks Steve, just looking at that document and as I suspected, it’s complicated, as it also depends on how busy NS is. Ok, might need to test it somehow to find out.

Just FYI we don't permit customers to do performance testing

Ah. ok noted.

In short, you should not need to worry about this because our platform scales. But if you're concerned then you should talk to your AMO about moving up a tier or if there are other considerations we that can be taken to ensure smooth operation

Probably not necessary. The question I got is “What happens if we send out lots of emails all round the world and the website gets 100s visitors all at once”. And I didn’t know.

100s of visitors at once is pretty small fish

ok cool.

To give you an idea, we do a web store for the Girl Scouts of America and they had a live event where Michelle Obama encouraged people to visit the site. It went fine.

ok, that sounds like reasonable testing.