This documentation is for WSO2 API Manager 1.5.0 View documentation for the latest release.
Page Comparison - Throttling Tiers (v.16 vs v.20) - API Manager 1.5.0 - WSO2 Documentation

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API-level throttling tiers are defined by the API creator when Creating an API using the API Publisher. At subscription time, the consumers of the API can log in to the API Store and select which tier they are interested in using the API Store as follows:

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According to the tiers s/he selects, the subscriber is granted a maximum number of requests to the API.

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A subscriber logged into the API Store can consume APIs using a specific tier, only if s/he is assigned to a role that is allowed access. In the API Store, the subscriber sees a list of tiers that is filtered based on the subscriber's role. Only the ALLOWED roles appear here:

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. By default, all tiers are allowed to everyone.

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  • When an API is invoked, it first checks whether the request is allowed by APIapplication-level throttling limit. If the consumer an application has exceeded his/her its maximum number of allowed API requests, the new request will be terminated.
  • If APIapplication-level limit is not exceeded, it then checks whether the request is allowed by applicationresource-level throttling limit. If it has exceeded, the request will be terminated.
  • If applicationresource-level limit is not exceeded, it finally checks whether the request is allowed by resourceAPI-level throttling limit. If the limit is not exceeded, then the request will be granted.

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