[keycloak-user] Keycloak admin rest api performance

Hi, Keycloak starts to having high latencies when there are 50–100 concurrent users interacting with the Admin REST API. I tested this by using Gatling and run a specific flow which involves calling the Admin REST API. Keycloak uses a H2 database during the performance test. Keycloak is ran in a docker container within docker for Mac. We are using the following endpoints frequently: POST /users - to create a new user GET /roles - to get realm roles POST /users/{userId}/role-mappings/realm - to assign realm roles to a user I tried increasing memory in the JVM flags, but that didn’t help. It shouldn’t be a problem to have that many users right ? How can I diagnose what’s going on? Is there a metric endpoint (Prometheus available)? Are there any other diagnostics I can run? Greets, Mark