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

Last Modified: Nov 22, 2021

Bug Tracker

Affected Product:  See more info
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

Symptoms

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.

Impact

Confusion of actual capacity usage.

Conditions

Running BIG-IP software on an i850.

Workaround

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

Fix Information

None

Behavior Change