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                                            Ulf Blom

[Bug] - Degraded Performance on AL2023 comparing to AL2

The performance regression is driven by NUMA auto-balancing changes in AL2023 kernels (6.1 & 6.12). AL2 → JVMs mostly local, low LLC misses, better perf. AL2023 → aggressive NUMA balancing...

[Bug] - Degraded Performance on AL2023 comparing to AL2

I have tried to: 1. Disable NUMA balancing system-wide echo "kernel.numa_balancing=0" | sudo tee /etc/sysctl.d/99-numa.conf sudo sysctl --system Verify: cat /proc/sys/kernel/numa_balancing # should return 0 2. Restart the whole EC2...