# Resource Limits

Below are some resource limits that vDB Kafka Cluster applies:

<table><thead><tr><th>Resource Limit</th><th data-type="number">Limit Value</th><th>Reason</th><th>How to Work Efficiently</th></tr></thead><tbody><tr><td>Number of clusters / user</td><td>10</td><td>Ensures proper resource allocation and prevents users from creating too many unnecessary clusters, affecting overall system performance.</td><td>Plan carefully and only create Kafka clusters that are truly needed. If you need more clusters than the limit, contact the support team.</td></tr><tr><td>Number of config groups</td><td>10</td><td>Helps centralize configuration management and avoid complexity from having too many configuration groups.</td><td>Use configuration groups efficiently, group similar configurations together and reuse them for multiple Kafka clusters.</td></tr><tr><td>Number of topics / cluster</td><td>50</td><td>Too many topics can affect Kafka cluster performance and complicate management.</td><td>Design topic structure carefully, use topics efficiently and avoid creating too many unnecessary topics.</td></tr><tr><td>Number of kafka users / cluster</td><td>50</td><td>Too many users can affect authentication and authorization performance, as well as complicate management.</td><td>Use users efficiently, group users with the same access rights and use user management features such as groups and roles to simplify access management.</td></tr></tbody></table>