# AWS Glue optimization | Cloud Efficiency Hub

Canonical: https://www.pointfive.co/efficiency-hub/cloud-services/aws-glue

3 documented AWS Glue cost inefficiencies, each with how to detect it and how to fix it.

[Cloud Efficiency Hub](https://www.pointfive.co/efficiency-hub) 

3 documented AWS Glue cost inefficiencies, each with how to detect it and how to fix it.

## 3 inefficiencies

[All services](https://www.pointfive.co/efficiency-hub#browse-by-service)

- AWS Glue  CER-0249

### [Outdated AWS Glue Version for Spark ETL Jobs](https://www.pointfive.co/efficiency-hub/inefficiencies/outdated-aws-glue-version-for-python-jobs-d2d59)

Newer AWS Glue versions - such as Glue 5.0, with 5.1 (now the default for new jobs) and 6.0 also available - include significant performance optimizations in the Spark runtime for Glue for Spark ETL jobs, whether written in PySpark or...

Compute

- AWS Glue  CER-0393

### [Non-Urgent Glue Spark Jobs Not Using Flex Execution](https://www.pointfive.co/efficiency-hub/inefficiencies/non-urgent-glue-spark-jobs-not-using-flex-execution)

AWS Glue Spark jobs run in the standard execution class unless configured otherwise, which provides fast startup on dedicated resources and is billed at the standard DPU-hour rate. Glue also offers a Flex execution class that runs jobs on...

Compute

- AWS Glue  CER-0394

### [Glue Spark Jobs With Fixed Worker Counts Instead of Auto Scaling](https://www.pointfive.co/efficiency-hub/inefficiencies/glue-spark-jobs-with-fixed-worker-counts-instead-of-auto-scaling)

AWS Glue Spark jobs are commonly configured with a fixed NumberOfWorkers sized for the heaviest stage, the largest expected input or a generous guess. Without Auto Scaling, every allocated worker is billed for the whole run, including...

Compute

## More AWS services

- [AWS EC2  23](https://www.pointfive.co/efficiency-hub/cloud-services/aws-ec2)

- [AWS RDS  19](https://www.pointfive.co/efficiency-hub/cloud-services/aws-rds)

- [AWS S3  15](https://www.pointfive.co/efficiency-hub/cloud-services/aws-s3)

- [AWS Lambda  12](https://www.pointfive.co/efficiency-hub/cloud-services/aws-lambda)

- [AWS EBS  10](https://www.pointfive.co/efficiency-hub/cloud-services/aws-ebs)

- [AWS CloudWatch  8](https://www.pointfive.co/efficiency-hub/cloud-services/aws-cloudwatch)

- [AWS EKS  8](https://www.pointfive.co/efficiency-hub/cloud-services/aws-eks)

- [AWS ElastiCache  8](https://www.pointfive.co/efficiency-hub/cloud-services/aws-elasticache)

- [AWS DynamoDB  7](https://www.pointfive.co/efficiency-hub/cloud-services/aws-dynamodb)

- [AWS Bedrock  6](https://www.pointfive.co/efficiency-hub/cloud-services/aws-bedrock)

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Source: the public page above. Product screenshots and illustrative interfaces are examples, not live customer data.