---
owner_slack: "#govuk-2ndline"
title: Defined CPU type does not match
parent: "/manual.html"
layout: manual_layout
section: Icinga alerts
last_reviewed_on: 2019-01-23
review_in: 6 months
---

In Carrenza, and not in AWS, we have two types of VM hosts that use either Intel or AMD processors.
Some VMs have significant performance degradation when on the AMD CPUs
and thus should live on the more performant Intel processor-based hosts.

If an alert reports that the defined CPU model name does not match what
it has been defined with, we should firstly try to find out why (has the
machine been recently rebuilt or vMotioned?) and then migrate the VM to
the correct host.

---
owner_slack: "#govuk-2ndline"
title: Defined CPU type does not match
parent: "/manual.html"
layout: manual_layout
section: Icinga alerts
last_reviewed_on: 2019-08-07
review_in: 6 months
---

In Carrenza, and not in AWS, we have two types of VM hosts that use either Intel or AMD processors.
Some VMs have significant performance degradation when on the AMD CPUs
and thus should live on the more performant Intel processor-based hosts.

If an alert reports that the defined CPU model name does not match what
it has been defined with, we should firstly try to find out why (has the
machine been recently rebuilt or vMotioned?) and then migrate the VM to
the correct host.

Update CPU types does not match doc Some apps are on Carrenza, making this still relevant.
Update CPU types does not match doc
Some apps are on Carrenza, making this still relevant.
