Test resulted with a 100% success rate for 159 orders over 30 seconds, ramping up from 1 virtual user per second to 10. Median response rate was 9.69 seconds.
This load test was low-medium scale. I recommend starting slowly about 1 virtual user per second for 10 seconds, then stepping up to higher load levels as each proves successful.
Never load test on a live site, and always be prepared to clean-up test data that gets generated. Also, be mindful of emails or any integrations that your store may have so you don’t overwhelm those services.
It’s a great idea to have New Relic APM running on the server being tested so you can uncover any performance bottlenecks related to your plugins or data.
Pro tip: Pantheon.io bundles New Relic APM for all Performance hosting plans starting at $125/mo.