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Often when buying a VPS, we are faced with a number of features. These include the RAM. In XEN virtualization RAM and swap is (or should be) dedicated. In OpenVZ, how important is "burst"? I ask because I have some doubts about the real importance of this value. Can someone please enlighten me?

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"Burst" is the hard upper limit of allocatable memory. "guarenteed" is a soft, exceedable limit.

More info can be found here and here

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