Atlassian AWS Graviton Migration: How Graviton CPUs Cut Cloud Costs by 10%

Atlassian has reversed its initial rejection of Amazon Web Services' Graviton processors and now powers thousands of Jira and Confluence instances on Graviton 4 CPUs. After conducting granular tests and fine-tuning Java Virtual Machine (JVM) settings, Atlassian achieved a 10% reduction in cloud costs and improved system performance.

Despite early setbacks, including unexplained performance slowdowns, Atlassian’s recent tests revealed key insights into Graviton's L3 cache behavior, leading to optimizations that resolved the issues. While the company has yet to fully reorganize its cloud fleet, the move marks a significant win for both performance and cost efficiency in its AWS deployment.

https://www.theregister.com/2025/11/13/atlassian_aws_graviton_migration/