We estimate that 10,000 clients with typical browsing activity over a 3 month period would result in a 5-7 GB database. The database size should scale linearly as more clients are added, assuming the new clients have roughly the same browsing habits as the initial group. Your mileage may vary, but we don’t expect database size to be the limiting factor to server scale. With Proton’s data retention policy setting, Proton will automatically delete older data to keep the database size manageable and performance at an acceptable level. The default for Proton’s data retention policy is automatically delete data older than 90 days. This setting can be modified on the Configuration page of Proton Manager.