How is RCU calculated?

1 read capacity unit (RCU) = 1 strongly consistent read of up to 4 KB/s = 2 eventually consistent reads of up to 4 KB/s per read. 2 RCUs = 1 transactional read request (one read per second) for items up to 4 KB. For reads on items greater than 4 KB, total number of reads required = (total item size / 4 KB) rounded up.

What is RCU and WCU in DynamoDB?

RCU: unit of read capacity has been defined as 1 strongly consistent read per second for an item as large as 4KB. WCU: unit of write capacity represents 1 write per second for an item as large as 1KB. The read operations will be rounded up to the next 4KB.

What is a read capacity unit?

A read capacity unit represents one strongly consistent read per second, or two eventually consistent reads per second, for an item up to 4 KB in size. To learn more about DynamoDB read consistency models, see Read Consistency. For example, suppose that you create a table with 10 provisioned read capacity units.

What is DynamoDB read capacity unit?

For Amazon DynamoDB Connector, the read capacity unit represents the number of reads per second of items up to 8 KB in size per second. For example, if you specify 10 read capacity units, you are requesting a throughput of 10 eventually consistent reads per second of 8 KB for that table.

How many writes per second DynamoDB?

One write capacity unit represents one write per second for an item up to 1 KB in size. If you need to write an item that is larger than 1 KB, DynamoDB must consume additional write capacity units. Transactional write requests require 2 write capacity units to perform one write per second for items up to 1 KB.

What is DynamoDB RCU?

What Is DynamoDB RCU? RCU or “Read capacity unit” represents one strongly consistent read per second, or two eventually consistent reads per second, for an item up to 4 KB in size.

Is RCU per second?

For reads, DynamoDB charges one RCU for each strongly consistent read per second, two RCUs for each transactional read per second, and one-half of an RCU for each eventually consistent read per second (up to 4 KB)….Provisioned capacity.

What is throttling in DynamoDB?

Throttling is one of the most common performance issues that you might encounter with your DynamoDB tables. Throttling could be caused by either DynamoDB or the applications that read or write into your DynamoDB table. Your DynamoDB table is in on-demand capacity mode, but the table is being throttled.