Controlling memory conditions in a virtual machine

A system for adjusting a resource allocation to a first virtual machine, the system comprising:

• one or more processors;
• memory and storage;
• a target memory condition selector, configured to select a target memory condition for the first virtual machine, wherein selecting the target memory condition comprises selecting a range of target memory conditions;
• a first memory condition determiner, configured to determine a first determined memory condition by executing an application on the first virtual machine, wherein determining the first determined memory condition comprises estimating a statistical measure of age of pages that are paged-out in the first virtual machine;
• a condition comparator, configured to compare said first determined memory condition and said target memory condition;
• and
• a resource allocation adjuster, responsive to said condition comparator, and configured to adjust the resource allocation to the first virtual machine.

A computer program product for adjusting a resource allocation to a first virtual machine, the computer program product comprising a computer readable medium that is non-transitory, the computer readable medium comprising:

• computer code for selecting a target memory condition for the first virtual machine, wherein selecting the target memory condition comprises selecting a range of target memory conditions;
• computer code for executing a first application on the first virtual machine to determine a first determined memory condition, wherein determining the first determined memory condition comprises estimating a statistical measure of age of pages that are paged-out in the first virtual machine;
• computer code for comparing said first determined memory condition and said target memory condition;
• and
• computer code, responsive to said comparing said first determined memory condition and said target memory condition, for adjusting the resource allocation to the first virtual machine.