# AWS HealthImaging throttling limits
Throttling limits

Your AWS account has throttling limits that apply to AWS HealthImaging API actions. For all actions, a `ThrottlingException` error is thrown if throttling limits are exceeded. For more information, see the [https://docs.aws.amazon.com/healthimaging/latest/APIReference](https://docs.aws.amazon.com/healthimaging/latest/APIReference).

**Note**  
Throttling limits are adjustable for all HealthImaging API actions. To request a throttling limit adjustment, contact the [AWS Support Center](https://console.aws.amazon.com/support/home#/). To create a case, log in to your AWS account and choose **Create case**.

The following table lists throttling limits for both [ native HealthImaging actions](https://docs.aws.amazon.com/healthimaging/latest/APIReference/API_Operations.html) and [representations of DICOMweb services](using-dicomweb.md).


**AWS HealthImaging throttling limits**  

| Action | Throttle rate | Throttle burst | 
| --- | --- | --- | 
| CreateDatastore | 0.085 tps | 1 tps | 
| GetDatastore | 10 tps | 20 tps | 
| ListDatastores | 5 tps | 10 tps | 
| DeleteDatastore | 0.085 tps  | 1 tps | 
| StartDICOMImportJob | 1 tps | 2 tps | 
| GetDICOMImportJob | 25 tps | 50 tps | 
| ListDICOMImportJobs | 10 tps | 20 tps | 
| SearchImageSets | 25 tps | 50 tps | 
| GetImageSet | 25 tps | 50 tps | 
| GetImageSetMetadata | 50 tps | 100 tps | 
| GetImageFrame | 1000 tps | 2000 tps | 
| ListImageSetVersions | 25 tps | 50 tps | 
| UpdateImageSetMetadata | 0.25 tps | 1 tps | 
| CopyImageSet | 0.25 tps | 1 tps | 
| DeleteImageSet | 0.25 tps | 1 tps | 
| TagResource | 10 tps | 20 tps | 
| ListTagsForResource | 10 tps | 20 tps | 
| UntagResource | 10 tps | 20 tps | 
| GetDICOMInstance\$1 | 50 tps | 100 tps | 
| GetDICOMInstanceMetadata\$1 | 50 tps | 100 tps | 
| GetDICOMInstanceFrames\$1 | 50 tps | 100 tps | 
| GetDICOMSeriesMetadata | 50 tps | 100 tps | 

\$1Representation of a DICOMweb service