Bug ID 713585: When the system config has many iRules and they are installed on many virtual servers, the config loading time is significantly long

Last Modified: Sep 29, 2022

Bug Tracker

Affected Product:  See more info
BIG-IP All(all modules)

Known Affected Versions:
12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2, 12.1.2 HF1, 12.1.2 HF2, 12.1.3,,,,,,,, 12.1.4,, 12.1.5,,,, 12.1.6, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1, 13.1.0,,,,,,,,, 13.1.1,,,,, 13.1.3,,,,,,, 13.1.4,, 13.1.5,, 14.0.0,,,,,, 14.0.1,

Fixed In:

Opened: Apr 04, 2018
Severity: 3-Major
Related AskF5 Article:


Config load could be very long and CPU usage very high.


BIG-IP system performance could be degraded during the load and may cause system lock up.


There are many iRule and they are installed on many virtual servers.


Run "tmsh modify sys db rule.validation value syntax", this causes iRule validation to check iRule syntax only; the semantic checks will not be performed.

Fix Information

In this release, the config loading time is cut significantly.

Behavior Change