The purpose of this feature is to allow administrators to selectively control which API calls are throttled, without having to rebuild and deploy a new version every time a throttle is changed.
...
The NORMALIZED_URI column must be unique since having 2 different throttling rules for the same API call would not make sense(maybe consider making this primary key instead of id?).ß
Reducing Table Accesses
UserThrottleFilter will have a in-memory cached version of this table. It would periodically check the THROTTLED_CALLS table and update its cached version to reflect the information in the database.
...
When an request comes in, the request URI will be normalized using normalizeMethodSignature() AccessRecordUtils of the Synapse-Warehouse-Records project (copy it over).
...