== Commitment level ==

Allocation guarantee commitment level

<math>

\frac{\displaystyle\sum_{all\ VE}

{RAM\ size + swap\ size}

</math>

is the ratio of the memory space guaranteed to be available for

allocations to the capacity of the system.

If a system has multiple Virtual Environments,

it is important to make sure that for each Virtual Environment

<math>privvmpages_{lim}\cdot4096 \le 0.6\cdot {RAM\ size}\rm.</math>

If this condition is not satisfied, a single Virtual Environment may easily

cause an excessive swap-out and very bad performance of the whole system.