im using vmware server
some times we have this problem ... i dont know how solve this problem

The directory "/tmp/vmware-root/" has less than 149 MB of free space.Running out
of free space in this directory may corrupt the virtual machine's RAM. This is
likely to cause the guest operating system to crash.To avoid these problems,
VMware recommends you move or delete files to free up space now. After you free
up space, select "Continue".To ignore this condition until you power off or
suspend the virtual machine, select "Ignore".