Method 1: Adjust and Enforce Retention using Veeam ONE Setting Utility
You can delete past performance data by lowering the performance data retention within the Veeam ONE Settings Utility by following the method documented in KB2051.
Note: When retention is enforced, performance data within the database is removed, however, the actual database file on disk will not become smaller. If you want the Veeam ONE database file to become smaller on disk, you must perform a Shrink Database operation against the Veeam ONE database after reducing performance data retention. **The SQL Script in Method 2 performs a shrink operation.