Contributor Insights in DynamoDB - Step-by-Step Execution

Concept Flow - Contributor Insights

Enable Contributor Insights on Table

↓

Table starts collecting write metrics

↓

Contributor Insights aggregates data

↓

Query Insights for top contributors

↓

Use insights to optimize table usage

Contributor Insights collects and aggregates data on the most active contributors to a DynamoDB table, helping you identify hot keys and optimize performance.

Execution Sample

DynamoDB

aws dynamodb update-table --table-name Music --contributor-insights-status ENABLED
aws dynamodb describe-contributor-insights --table-name Music

Enable Contributor Insights on a table and then query the current insights to see top contributors.

Execution Table

Step	Action	Input/Condition	Result/Output
1	Enable Contributor Insights	Table: Music	Contributor Insights enabled on Music table
2	Table receives writes	Writes to Music table	Metrics start collecting per partition key
3	Aggregate data	Time window (e.g., 1 min)	Top contributors identified with counts
4	Query Insights	Describe Contributor Insights API call	Returns top contributors and metrics
5	Use insights	Analyze hot keys	Optimize table design or capacity
6	Exit	No more queries or insights needed	Stop collecting or keep enabled as needed

💡 Insights collection stops when disabled or table deleted

Variable Tracker

Variable	Start	After Step 1	After Step 2	After Step 3	After Step 4	Final
ContributorInsightsStatus	DISABLED	ENABLED	ENABLED	ENABLED	ENABLED	ENABLED
WriteMetrics	None	Collecting	Collecting	Aggregated	Available	Available
TopContributors	None	None	None	Partial list	Full list	Full list

Key Moments - 3 Insights

Why do we need to enable Contributor Insights before seeing any data?

Contributor Insights must be enabled first (see execution_table step 1) because only then does DynamoDB start collecting write metrics needed to identify top contributors.

What does 'Top Contributors' mean in the context of Contributor Insights?

Top Contributors are the partition keys or items that generate the most traffic or writes during a time window, as shown in execution_table step 3 and 4.

Can Contributor Insights data be queried immediately after enabling?

No, data collection starts after enabling and requires some time to aggregate metrics (see execution_table steps 2 and 3). Queries before that return no data.

Visual Quiz - 3 Questions

Look at the execution_table, at which step does DynamoDB start collecting write metrics?

A Step 1

B Step 3

C Step 2

D Step 4

💡 Hint

Check the 'WriteMetrics' variable in variable_tracker after Step 2

According to variable_tracker, what is the status of ContributorInsightsStatus after Step 1?

A ENABLED

B DISABLED

C PARTIAL

D UNKNOWN

💡 Hint

Look at the ContributorInsightsStatus row and the After Step 1 column

If you disable Contributor Insights, what happens according to the exit_note?

A Data collection continues

B Insights collection stops

C Table is deleted

D Top contributors reset to zero

💡 Hint

Refer to the exit_note in execution_table

Concept Snapshot

Contributor Insights in DynamoDB:
- Enable on a table to start collecting write metrics
- Aggregates data on top contributors (hot keys)
- Query insights via API to identify heavy traffic keys
- Use insights to optimize table design and capacity
- Disable to stop data collection

Full Transcript

Contributor Insights is a feature in DynamoDB that helps you find which keys or items are causing the most traffic on your table. First, you enable Contributor Insights on your table. Then, DynamoDB starts collecting write metrics for each partition key. Over time, it aggregates this data to identify the top contributors. You can query these insights using the Describe Contributor Insights API to see which keys are the busiest. This helps you optimize your table's design or capacity. If you disable Contributor Insights, data collection stops. This process helps keep your table efficient and avoid hot partitions.