ORY Oathkeeper HPA tuning

[strekm]

Description

Remove memory metric from ORY Oathkeeper HPA conf.

PR

• https://github.com/kyma-project/api-gateway/pull/1053

DoD:

• [ ] Provide unit and integration tests.
• [x] Provide documentation.
• [x] Verify if the solution works for both open-source Kyma and SAP BTP, Kyma runtime.
• [ ] If you changed the resource limits, explain why it was needed.
• [ ] Verify that your contributions don't decrease code coverage. If they do, explain why this is the case.
• [x] Add release notes.

Attachments

https://github.com/kyma-project/istio/blob/600154898e73494db467f9c5d9ff058dd0db58ff/internal/istiooperator/istio-operator-light.yaml#L63

[barchw]

Run the performance tests with Oathkeeper scaling based on CPU + Memory vs CPU only, no difference can be seen.

Results:

• CPU + Memory:
  • https://snapshots.raintank.io/dashboard/snapshot/mzQaXq390DzzkvU33jjLFXqp6KcNQdQi?orgId=0
  • https://snapshots.raintank.io/dashboard/snapshot/G8edG3TNneT71dVXWw9vKQ7LvoNCx5Ro?orgId=0
• CPU:
  • https://snapshots.raintank.io/dashboard/snapshot/LQAjQOrUpvzxuTkOYxt12Yc43ZnQJBHv?orgId=0
  • https://snapshots.raintank.io/dashboard/snapshot/WO4kxYzWXDX6jc83aEJH6GeDxUST4yS9?orgId=0