What is guaranteed and burst memory (RAM) ?

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Guaranteed RAM is the amount of memory that is allocated for your virtual server, this is the fixed memory that you get automatically when you purchased a VPS hosting plan.

Burstable RAM is the maximum memory allowance that your VPS can use along with your guaranteed memory as long as the spare memory is still available for you to use.

For example, in a virtual server where your guaranteed memory is 256MB and your burstable memory is 1GB that means you have access up to 1GB of unused memory along with your guaranteed 256MB of RAM. This is possible because other VPS user that you shared memory with are not using much RAM.

The burst allotment is not the same thing as your resource guarantee. You cannot count on constant, sustained utilization of your burst resources. If your VPS constantly requires greater resources than your package guarantees, then you must upgrade to the higher VPS or Dedicated server plan.

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