Throttle Limits#
Admin (by default, this is disabled). We recommend that the Admin throttle is enabled and set to 450 API requests/min. The setting is per Unified Node.
Service Inventory (SI) Report: Relies on the per-user throttle setting to ensure adequate throughput.
For the Active-StandBy deployment model, we highly recommended that the SI report is configured to run on a specific non-Primary Unified Node (preferably in the Secondary Data Center as those nodes are likely to have a lower load). This results in faster performance, but there is not any protection against a single node failure in the middle of an SI report run (not very likely). The use of a Web Proxy is not recommended here as 25% of the initial requests are routed to the Primary Unified Node based on the recommended web weight settings at either Web Proxy.
For the Active-Active deployment model, you can use a Web Proxy instead. The SI report would run slower, but this configuration provides protection against a single Unified Node failure during the SI report run. If a Web Proxy is used, then:
Use Web Proxy 2. This prevents routing to the Primary Unified Node based on the recommended web weight settings.
The Web Proxy knows the health of the UN and can route requests accordingly.
Per User throttle for API Clients:
Default setting is 20 API req/sec per Active Unified Node. 4 Active Unified Nodes x 20 = 80 API req/sec (system wide) or 4800 API req/min (system wide). We recommend that you keep this setting.
This limit applies to all admin users, but in practice serves to limit API clients. Human admin users are not likely to create a traffic rate of 80 API req/sec.
Self-Service throttle. The default setting is 300 API req/min (per Unified Node). APIs for logins and actions would count against this throttle.