Bug ID 988165: VMware CPU reservation is now enforced.

Last Modified: Jun 07, 2022

Bug Tracker

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

Known Affected Versions:
15.1.0,,,,,, 15.1.1, 15.1.2,, 15.1.3,, 15.1.4,, 15.1.5, 16.1.0, 16.1.1, 16.1.2,

Fixed In:

Opened: Jan 29, 2021
Severity: 3-Major


CPU reservation is not enforced which can result in users over-subscribing their hosts.


If a host is oversubscribed, performance can suffer as traffic volumes increase.


BIG-IP Virtual Edition running in VMware.


Manually enforce the 2GHz per core rule when provisioning VMware instances to ensure that your VMware hosts are not oversubscribed.

Fix Information

The VMware CPU reservation of 2GHz per core is now enforced. The CPU reservation can be up to 100 percent of the defined virtual machine hardware. For example, if the hypervisor has 2.0 GHz cores, and the VE is set to 4 cores, you will need 4 x 2.0 GHz reserved for 8GHz (or 8000 MHz).

Behavior Change