Checking memory usage

Resource allocation and current usage can be found in the Virtuozzo Power Panel. The most important parameters are privvmpages is a so-called burstable (or max) memory, vmguarpages - guaranteed virtual memory and oomguarpages - out of memory guarantee (min memory).
Please note that all resources with *pages is the reource name are measured in memory pages, on most systems 1 page = 4 KB
So is the amount of memory currently being used by all my processes equal to the "currently use" column of privvmpages or oomguarpages?

Privvmpages shows amount of allocated memory by all processes running inside the VPS. If you reach the limit, Virtuozzo will decline new memory allocation request until usage will be reduced.