Opportunity Name:
Lambda Log Verbosity Optimization
AWS Resource Type:
AWS Lambda / CloudWatch Logs
Opportunity Description:
Excessive logging in AWS Lambda functions can lead to significantly higher CloudWatch log ingestion and storage costs. This Finder analyzes the volume of logs produced per invocation to identify Lambda functions that generate disproportionate log data—often due to verbose or debug-level logging.
By identifying Lambda functions with unusually high bytes-per-invocation ratios and large volumes of debug-level logs, CloudFix can help reduce unnecessary log overhead and improve both cost efficiency and system performance.
Criteria for Identifying the Opportunity:
The Finder identifies optimization opportunities based on:
- Log ingestion cost exceeding 1% of the total Lambda cost
- Average log volume per invocation significantly higher than baseline (typically 1–5KB)
- More than 50% of logs categorized as debug level
- Functions that still exist and have measurable usage
Potential Savings (if known):
Savings will vary by workload, but Lambda functions with excessive logging may save 10%–60% on their associated CloudWatch costs. The Finder estimates savings by calculating what log costs would be if only critical-level logs were retained.
What Happens When the Fixer is Executed?
Note: This is a manual optimization.
CloudFix does not modify logging behavior directly. Instead, it generates a recommendation report for each identified function, including:
- Total log volume
- Log level breakdown (DEBUG vs. CRITICAL)
- Estimated cost savings
- Specific guidance on reducing verbosity (e.g., avoid JSON dumps, reduce loop-based logging, filter stack traces)
Is It Possible to Roll Back Once CloudFix Implements the Fixer?
Yes. Since this opportunity results in a manual recommendation rather than an automatic change, any logging adjustments made are fully under your control and reversible.
Can CloudFix Implement the Fix Automatically Once I Accept the Recommendation?
No. This Finder does not include an automatic fixer. The recommended changes to log levels or verbosity must be implemented manually by your engineering team.
Does the Fix Require Downtime?
No. Changes to logging levels in Lambda functions can be deployed using standard CI/CD processes without requiring downtime.
Bill Gleeson
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