Bug ID 698991: CPU utilization on i850 is not a reliable indicator of system capacity

Last Modified: Jul 12, 2023

Affected Product(s):
BIG-IP TMOS(all modules)

Known Affected Versions:
15.0.0, 14.0.0, 13.1.1, 12.1.3

Opened: Dec 14, 2017

Severity: 4-Minor

Related Article: K64258832


Unlike previous platforms, the i850 may report between 50-70% CPU utilization when at full capacity. The specific number is workload dependent, and therefore should not be used as an indicator of system headroom for sizing purposes.


Confusion of actual capacity usage.


Running BIG-IP software on an i850.


Refer to the BIG-IP stats and published capabilities to determine utilized capacity under a specific workload.

Fix Information


Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips