OpenVZ Memory Statistics

Virtuozzo VPS is composed of several parameters that are called QOS Parameters. These parameters define all the resources i.e disk space, memory, cpu, disk inodes etc for that VPS.  The parameters are defined inside VPS configuration file. A file /proc/user_beancounters inside the VPS contains the real time usage figures for these parameters. RAM statistics can be calculated for any Virtuozzo Linux VPS using these Formulas:

Guaranteed memory = barrier of vmguarpages / 1024 * 4
Burstable memory = privvmpages / 1024 x 4
Current Memory Usage= physpages held value /1024 * 4
Current Usage (RAM + SWAP)= oomguarpages held value /1024 * 4

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