How many concurrent users can a 0.5 CPU / 512 MB Render instance with Spring Boot handle (DB on Basic 256 MB plan)?

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Hi everyone,

I’m running a Spring Boot application on Render with the following specs:

  • App server: 0.5 vCPU, 512 MB RAM

  • Database (Basic plan): 0.1 vCPU, 256 MB RAM, 1 GB storage

The app mainly exposes REST APIs, handles form submissions, a lot of requests per users. But not continuesly.

I’d like to understand roughly how many concurrent users this setup could handle in practice. I know it depends a lot on workload, but if anyone has run Spring Boot with a similar configuration (and small DB instance), I’d love to hear your experience or benchmarks.

Thanks!