Description of problem:

Version-Release number of selected component (if applicable): 4.18.22

How reproducible: Always

Steps to Reproduce:

1. Install cluster

2. Install OSSM

Actual results: OVN overall consumption is about 180GiB RAM for a 3TiB ram cluster. The same cluster consumed 18GiB before migration to OVN

Expected results: Explain consumption and state if it's normal or not

Additional info: This is critical as it block customer upgrade to 4.18 and a customer project to deploy a new datacenter.

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Affected Platforms:

Clusters runs on vmware wit in UPI mode. Case number in first private comment.

One error seen in logs is 'error: OFPT_ERROR (OF1.5) (xid=0x5cd1d58): OFPBFC_TIMEOUT error' but not sure it's relevant.