This document is about PowerDNS 4.0. For other versions, please see the documentation index.

Before upgrading, it is advised to read the changelog. When upgrading several versions, please read all notes applying to the upgrade.

4.0.x to 4.1.0

setting-max-recursion-depth defaulted to 4 but was always overridden to 6 during the startup. The issue has been fixed and the default value set to 6 to keep the behavior consistent.

4.0.5 to 4.0.6

One default was changed:

4.0.3 to 4.0.4

One setting has been added to limit the risk of overflowing the stack:

4.0.0 to 4.0.1

Two settings have changed defaults, these new defaults decrease CPU usage: