Bug ID 844689: Possible temporary CPU usage increase with unusually large named.conf file

Last Modified: Sep 13, 2023

Affected Product(s):
BIG-IP DNS, GTM(all modules)

Known Affected Versions:
14.1.0,,,,,, 14.1.2,,,,,,,,, 14.1.3, 15.0.0, 15.0.1,,,,, 15.1.0,,,,,, 15.1.1

Fixed In:
16.0.0, 15.1.2,

Opened: Oct 30, 2019

Severity: 3-Major


You might see occasional and temporary CPU usage increases when named.conf file is unusually large.


When a zone file is updated, a downstream effect is the ZoneRunner process to parse again the named.conf file. The parsing of an unusually large file may cause a temporary increase in CPU usage.


Unusually large named.conf file and zones are checked for updates (when the SOA expires).



Fix Information

ZoneRunner does not issue a reload command when zones are checked for updates, so no CPU usage increases occur.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips