DynamoDB Table is nearing provisioned WCUs

Why do I see this?

One of your DynamoDB tables has consumed more than 80% of the provisioned write capacity units (WCUs) in the last 60 minutes.

What does this mean?

AWS offers two read/write capacity modes for processing reads and writes requests on DynamoDB tables:

• On-demand
• Provisioned

As the name suggests, the on-demand mode automatically accommodates the read/write requests as they ramp up or down whereas the provisioned mode lets you specify the number of reads and writes per second that is required for your applications. If a table exceeds its provisioned capacity, it may start throttling write requests and failing them with an HTTP 400 code: Bad Request and a ProvisionedThroughputExceededException. This event notifies you when one of your DynamoDB tables has consumed over 80% of the average provisioned WCUs in the last 60 minutes.

How do I fix "DynamoDB Table is nearing Provisioned WCUs"?

With this event, you will be notified well within time to take necessary actions to prevent your application's write requests on a table from throttling and failing. You can start by getting familiarized with Amazon's write capacity units and capacity unit consumption for writes by various DynamoDB operations. Set sufficient provisioned capacity based on what your application requires. You can also use DynamoDB autoscaling to manage provisioned capacity for the tables in response to traffic.