Choosing how much.
WHAT TO ESTABLISH
What the workload actually requires How that varies through the day and the week What happens when it is exceeded
WHAT PEOPLE DO
Guess large, to be safe.
WHAT THAT COSTS
Continuously, for capacity never used.
Over-provisioning is the most common cloud waste.
A BETTER APPROACH
Start modest, measure, and adjust.
The point of cloud resources is that adjusting is easy.
WHAT TO MEASURE
Processing use Memory use Storage growth Response times under real load
WHAT UNDER-PROVISIONING LOOKS LIKE
Slowness under load Errors at busy times Processes failing
WHAT OVER-PROVISIONING LOOKS LIKE
Consistently low utilisation and a high bill.
WHAT TO REVIEW MONTHLY
Utilisation against what you are paying for.
WHAT TO DO WITH THE FINDING
Resize. It usually takes minutes.
WHAT NOT TO DO
Size once and never revisit.
