Does dynamoDB charge for throttled requests?

2
votes

Whenever dynamoDB throws the ProvisionedThroughputExceededException, does DynamoDB still charge us for the request sent to it.

Update :

  1. we use both the schemes, provisioned + auto scaling and OnDemand for our DDB tables.
  2. I am trying to understand if DDB will still consider WCU/RCU consumed for throttled requests which resulted in ProvisionedThroughputExceededException
  3. DynamoDB in their definition of WCU and RCU states that every API call to DDB is considered as write/read request. (https://aws.amazon.com/dynamodb/pricing/on-demand/) Does it mean that even failed API calls ( Internal Error 500, ProvisionedThroughputExceededException) will be charged ?
2
amazon-web-servicesamazon-dynamodbaws-dynamodb
What about other exceptions? Does one rule apply for all (charge or no charge)? - JakeTheSnake
Related: for ConditionalCheckFailedException, "If a ConditionExpression evaluates to false during a conditional write, DynamoDB still consumes write capacity from the table" - JakeTheSnake

2 Answers

2
votes

Adding the response I got from AWS support. They don't charge when the request to DDB gets throttled.

0
votes

If you are using Provisioned Capacity, there is no charge for the individual requests. Rather, you pay for a particular capacity of requests.

If you are using On-Demand Capacity, requests are charged at $1.4231 per million write request units and $0.285 per million read request units. So, unless you are receiving millions of ProvisionedThroughputExceededException errors, it wouldn't have much of an impact on your bill.