09-27-2011
ok...in that case, what is the real interpretation of virtual memory value shown with top command ?
man page says:
PHP Code:
VIRT -- Virtual Image (kb)
The total amount of virtual memory used by the task. It includes all code, data and shared libraries plus pages that have been swapped out. (Note: you can define the STATSIZE=1 environment variable and
the VIRT will be calculated from the /proc/#/state VmSize field.)
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LEARN ABOUT CENTOS
systemd-detect-virt
SYSTEMD-DETECT-VIRT(1) systemd-detect-virt SYSTEMD-DETECT-VIRT(1)
NAME
systemd-detect-virt - Detect execution in a virtualized environment
SYNOPSIS
systemd-detect-virt [OPTIONS...]
DESCRIPTION
systemd-detect-virt detects execution in a virtualized environment. It identifies the virtualization technology and can distinguish full VM
virtualization from container virtualization.
When executed without --quiet will print a short identifier for the detected virtualization technology. The following technologies are
currently identified: qemu, kvm, vmware, microsoft, oracle, xen, bochs, chroot, uml, openvz, lxc, lxc-libvirt, systemd-nspawn.
If multiple virtualization solutions are used, only the "innermost" is detected and identified. That means if both VM virtualization and
container virtualization are used in conjunction, only the latter will be identified (unless --vm is passed).
OPTIONS
The following options are understood:
-h, --help
Prints a short help text and exits.
--version
Prints a short version string and exits.
-c, --container
Only detects container virtualization (i.e. shared kernel virtualization).
-v, --vm
Only detects VM virtualization (i.e. full hardware virtualization).
-q, --quiet
Suppress output of the virtualization technology identifier.
EXIT STATUS
If a virtualization technology is detected, 0 is returned, a non-zero code otherwise.
SEE ALSO
systemd(1)
systemd 208 SYSTEMD-DETECT-VIRT(1)