AWS Lambda · Finder + guided fix
Lambda Optimize Logs
OptimizeLogs
Optimize Lambda function logging to reduce CloudWatch costs. CloudFix identifies functions with excessive logging and recommends log level adjustments.
What happens, in order.
Finder · read-only
Finds the opportunity
Scans your connected accounts with a read-only role. It can see resource metadata and usage; it can’t change anything.
You
Review in Recommendations
It appears in your Recommendations view with what it would save.
Guided fix
You make the change
You apply it yourself, following the fix’s step-by-step instructions; the write-up below explains it.
Finder role
Read-only. It can see resource metadata and usage. It can’t change anything.
Fixer role
Not used here: this one is a guided fix, so the change is yours to make.
Saves by
Excessive logging in AWS Lambda functions can lead to significantly higher CloudWatch log ingestion and storage costs. This Finder identifies Lambda functions that generate disproportionate log data, often due to verbose or debug-level logging, so you can reduce unnecessary log overhead and improve both cost efficiency and system performance.
AWS Lambda functions automatically send their logs to CloudWatch Logs, but excessive or verbose logging can lead to unnecessarily high costs. This CloudFix Finder helps identify Lambda functions with disproportionate logging volumes and provides recommendations for optimization to reduce your CloudWatch costs while maintaining essential operational visibility.
Overview
Lambda functions can generate significant amounts of log data, especially when configured with verbose or debug-level logging. While comprehensive logging is important for debugging and monitoring, excessive logging can lead to unnecessary CloudWatch costs through increased log ingestion and storage. This Finder analyzes your Lambda functions' logging patterns to identify opportunities for optimization.
AWS Services Affected
How It Works
The finder uses your cost and usage data and CloudWatch Logs usage, read-only, to identify Lambda functions whose logging is disproportionate to their workload, often because of verbose or debug-level logging. Each function appears in your Recommendations with its log volume and costs, the estimated savings and guidance for reducing log verbosity.
This is a manual optimization that you apply: you adjust the function’s log levels and logging code and roll the change out through your normal deployment process.
Benefits
- Cost Reduction: Save 10-60% on CloudWatch costs associated with verbose Lambda logging
- Performance Optimization: Reduce unnecessary logging overhead in your Lambda functions
- No Downtime Required: Implement logging changes through your normal CI/CD process
- Reversible Changes: All logging modifications are under your control and can be adjusted as needed
Best Practices
- Use appropriate log levels (ERROR, WARN, INFO, DEBUG) based on the information's importance
- Avoid logging large objects or full JSON payloads in production
- Implement log sampling for high-volume events
- Consider using structured logging formats for better searchability
- Regularly review and adjust logging levels based on operational needs
Related Resources
See whether this one applies to your account.
A free savings assessment reports which fixers can be applied to your environment. Results typically within 24 hours.