What load does SQL audit generate for a SQL server?

Impact on SQL servers

The most noticeable impact on your SQL servers will be during the initial data collection. Netwrix Auditor runs several SQL scripts to build and store a ‘baseline’ of data against which it will compare future collections. However, even this initial collection will result in very little performance impact unless you are already running your servers at capacity. During subsequent data collections the impact will be even lower.

With daily collections running at 03.00 AM by default and SIT collections running at 4:00 AM, there may be a conflict with maintenance tasks running at the same time. If you are planning to run heavy maintenance jobs on your SQL servers during off-hours, please consider doing that before 03:00 AM.