A Compute Instance shape is a template that determines the number of CPUs, amount of memory, and other resources allocated to a newly created instance. These pre-defined shapes are used to provision compute instance. Sometimes we create a compute instance and later we required to change the instance shape. Either we need to lower down the number of resources to save cost or increase the resource to serve the higher load.
Following are the detail steps to change instance shape from VM.Standard.2.2 to VM.Standard.2.1. A small downtime is required for Compute Instance shape change.
On my instance page, I have two Compute instance with VM.Standard.2.2 shape. Web1 and Web2 are my two instances and both are running.
Select the compute instance to change the instance size. Click on Instance name.
On instance detail page click on Change Shape.
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Select the shape series and we can notice there is current Shape selected.
Click on required shape and click on Change Shape.
There will be confirmation window. Click on Reboot Instance to reflect the change.
We can notice the instance is STOPPING and within few min it will be back to RUNNING.
Within few moment. The instance is up with new shape.
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