Is your VPS provider overselling?

You can find out if your VPS is overselling the memory with utilities such as this one:

• http://k0nsl.org/bag/vzfree.c (author lowendbox)

Shell script:

• http://k0nsl.org/bag/vSwap.sh

Or this Ruby one:

• http://k0nsl.org/bag/vSwap.ruby

They more or less work the same, all of them. The C code is probably best with regard to memory utilization though.

For more comphrensiv reading with details, see:

• Checking Memory Usage inside OpenVZ VE.

That’s all.