How rate-limiting is enforced for Private Cloud tenants

Knowledge Articles
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Problem Statement

We would like to better understand the published information about rate limits as it relates to our Private cloud environment. Please explain:

  1. Are the Rate Limit values mentioned shared among tenants, or are they individual limits for each tenant?
  2. Is understanding the Rate Limit values mentioned in the context of the Management API applicable to the Authentication API?

Solution

  1. Are the Rate Limit values mentioned shared among tenants, or are they individual limits for each tenant? Rate limits are enforced at the tenant level, but the published rate limits are what the environment is sized for. So, for example, consider an environment that is sized for a Service Tier of 500 rps.
  • If you only had one tenant in that environment, under normal operating conditions, this would probably not lead to any rate-limiting issues.
  • If you had multiple tenants in that environment, and each tenant had a load approaching the rate limit, that might lead to rate-limiting and performance problems.

Example: consider an environment that is sized for 500 rps and has two tenants. If each tenant had a load of 499 rps, then the combined 998 rps load on the environment may well lead to rate-limiting problems.

  1. Is understanding the Rate Limit values mentioned in the context of the Management API applicable to the Authentication API?

Yes, both the Management API and Authentication API are subject to rate-limit constraints for Private Cloud customers:

Note that these limits are determined by your choice of service tier.