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Jira and Confluence AWS Graviton Migration

1 post · Nov 2025

What this trail covers

Atlassian has successfully migrated over 3000 EC2 instances for Jira and Confluence to AWS Graviton, achieving significant improvements in performance, reliability, and cost efficiency. This migration involved overcoming previous challenges related to CPU cache L3 miss-prediction and optimizing JVM settings for the Arm architecture. The initiative leveraged Graviton4 instances and a refined testing methodology focusing on 'Throughput at breaking latency' and low-level hardware metrics.

All Atlassian trails
  1. Migrating the Jira and Confluence applications to AWS GravitonThis post details the successful migration of over 3000 EC2 instances for Jira and Confluence to AWS Graviton, specifically Graviton4. It highlights the technical challenges faced, including CPU cache L3 miss-prediction and JVM optimization for Arm architecture. The migration employed a refined testing methodology focusing on 'Throughput at breaking latency' and the use of CPU Performance Monitoring Units (PMU) to gather low-level hardware metrics. The outcomes include improved performance, reliability, and cost efficiency.