[keycloak-user] Efficient per client session statistics

We've recently implemented a monitoring system, that's scraping the /session-count and /offline-session-count of each client. However we noticed, that this causes huge spikes on the Infinispan nodes (200k sessions and 2M offline sessions), also it's not very efficient and requires several hundred API calls. Is there any metric system currently available that provides this data? We're specifically looking for the per-client values as we had several incidents with misconfigured clients that created huge amounts of sessions. And we can never rule out reoccurrence, as long as per-client or per-user session limits are implemented.