Description of problem:

With the latest set of downstream OVNK merges, we have seen a regression in the ovn-controller memory usage. 

4.19

Regression(s) found :
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Previous Version:    4.19.0-0.nightly-2025-12-03-084710
Bad Version:         4.19.0-0.nightly-2025-12-03-134927
PR diff:

• https://github.com/openshift/cluster-monitoring-operator/pull/2760
• https://github.com/openshift/kubernetes-autoscaler/pull/388
• https://github.com/openshift/ovn-kubernetes/pull/2872
  --------------------------------------------------

4.20 

Regression(s) found :
--------------------------------------------------
Previous Version:    4.20.0-0.nightly-2025-12-07-081959
Bad Version:         4.20.0-0.nightly-2025-12-07-155619
PR diff:
N/A - Payload tests have not completed yet
--------------------------------------------------

4.21

Regression(s) found :
--------------------------------------------------
Previous Version:    4.21.0-0.nightly-2025-12-04-023306
Bad Version:         4.21.0-0.nightly-2025-12-05-204547
PR diff:

• https://github.com/openshift/agent-installer-utils/pull/187
• https://github.com/openshift/api/pull/2498
• https://github.com/openshift/api/pull/2575
• https://github.com/openshift/api/pull/2611
• https://github.com/openshift/api/pull/2612
• https://github.com/openshift/api/pull/2614
• https://github.com/openshift-assisted/assisted-installer-ui/pull/3289
• https://github.com/openshift/assisted-installer/pull/1384
• https://github.com/openshift/assisted-service/pull/8229
• https://github.com/openshift/assisted-service/pull/8477
• https://github.com/openshift/assisted-service/pull/8478
• https://github.com/openshift/cluster-api-provider-azure/pull/354
• https://github.com/openshift/cluster-api-provider-gcp/pull/253
• https://github.com/openshift/cluster-api-provider-ibmcloud/pull/127
• https://github.com/openshift/cluster-api-provider-openstack/pull/385
• https://github.com/openshift/cluster-api-provider-vsphere/pull/60
• https://github.com/openshift/cluster-api/pull/243
• https://github.com/openshift/cluster-autoscaler-operator/pull/357
• https://github.com/openshift/cluster-capi-operator/pull/411
• https://github.com/openshift/cluster-capi-operator/pull/417
• https://github.com/openshift/cluster-capi-operator/pull/418
• https://github.com/openshift/cluster-capi-operator/pull/419
• https://github.com/openshift/cluster-csi-snapshot-controller-operator/pull/258
• https://github.com/openshift/cluster-etcd-operator/pull/1517
• https://github.com/openshift/cluster-monitoring-operator/pull/2771
• https://github.com/openshift/cluster-network-operator/pull/2841
• https://github.com/openshift/cluster-node-tuning-operator/pull/1439
• https://github.com/openshift/console-operator/pull/1074
• https://github.com/openshift/console-operator/pull/1076
• https://github.com/openshift/console/pull/15613
• https://github.com/openshift/console/pull/15746
• https://github.com/openshift/console/pull/15802
• https://github.com/openshift/console/pull/15808
• https://github.com/openshift/hypershift/pull/7213
• https://github.com/openshift/hypershift/pull/7280
• https://github.com/openshift/hypershift/pull/7285
• https://github.com/openshift/hypershift/pull/7290
• https://github.com/openshift/hypershift/pull/7298
• https://github.com/openshift/hypershift/pull/7310
• https://github.com/openshift/hypershift/pull/7319
• https://github.com/openshift/hypershift/pull/7321
• https://github.com/openshift/hypershift/pull/7331
• https://github.com/openshift/hypershift/pull/7333
• https://github.com/openshift/installer/pull/10100
• https://github.com/openshift/installer/pull/10100
• https://github.com/openshift/installer/pull/10122
• https://github.com/openshift/installer/pull/10122
• https://github.com/openshift/installer/pull/10132
• https://github.com/openshift/installer/pull/10132
• https://github.com/openshift/installer/pull/10135
• https://github.com/openshift/installer/pull/10135
• https://github.com/openshift/ironic-agent-image/pull/217
• https://github.com/openshift/ironic-agent-image/pull/218
• https://github.com/openshift/ironic-agent-image/pull/219
• https://github.com/openshift/ironic-image/pull/732
• https://github.com/openshift/ironic-image/pull/735
• https://github.com/openshift/ironic-image/pull/737
• https://github.com/openshift/ironic-image/pull/739
• https://github.com/openshift/kubernetes/pull/2526
• https://github.com/openshift/machine-api-operator/pull/1441
• https://github.com/openshift/machine-api-provider-openstack/pull/140
• https://github.com/openshift/machine-config-operator/pull/5403
• https://github.com/openshift/machine-config-operator/pull/5448
• https://github.com/openshift/machine-config-operator/pull/5453
• https://github.com/openshift/machine-config-operator/pull/5456
• https://github.com/openshift/machine-config-operator/pull/5458
• https://github.com/openshift/machine-config-operator/pull/5464
• https://github.com/openshift/monitoring-plugin/pull/663
• https://github.com/openshift/openshift-controller-manager/pull/423
• https://github.com/openshift/operator-framework-operator-controller/pull/574
• https://github.com/openshift/origin/pull/30507
• https://github.com/openshift/origin/pull/30564
• https://github.com/openshift/origin/pull/30565
• https://github.com/openshift/ovn-kubernetes/pull/2887
  --------------------------------------------------

Version-Release number of selected component (if applicable):

How reproducible:

The trend has continued (higher memory usage) - we have more data since the change showing the trend stable (using the higher amount of memory).