The latest update adds support for a TSQL style WITH keyword for specifying optional parameters for tweaking the query/scan operation. For queries, you can specify the NoConsistentRead and PageSize options to use eventually consistent read and throttle the number of items returned per request respectively. Similarly for scans, you can use the PageSize option for throttling your scan requests too, but the DynamoDB scans does not support strong consistency.
According to DynamoDB best practices, you should avoid sudden bursts of read activity, using the new PageSize option you can make sure that your query/scan does not consume too many read capacity unit in a short burst and end up causing more critical reads to be throttled.
For example, a query which returns 10 items per request using eventually consistent read will look something like this:
whereas a scan will look like:
For more details about the full syntax, please refer to the Getting Started document, which has been updated to include the new WITH keyword.
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Here is a complete list of all my posts on serverless and AWS Lambda. In the meantime, here are a few of my most popular blog posts.
- Lambda optimization tip – enable HTTP keep-alive
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- Many faced threats to Serverless security
- We can do better than percentile latencies
- I’m afraid you’re thinking about AWS Lambda cold starts all wrong
- Yubl’s road to Serverless
- AWS Lambda – should you have few monolithic functions or many single-purposed functions?
- AWS Lambda – compare coldstart time with different languages, memory and code sizes
- Guys, we’re doing pagination wrong