Memory

The Memory window shows information about the windows memory. 

It is splitted in two parts:

1. Aggregated Statistics

Memory usage % Memory usage as percentage of total configured or available memory
Memory state Memory state (0-3) corresponding to the amount of free memory on host (percentage of machine memory minus Service console memory)

0: high (>= 6%)
1: soft (between 4% and 6%)
2: hard (between (2% and 4%)
3: low (between 1 and 2%)

2. Per Memory type statistics

active Sum of Memory Active of all powered on VMs and VMware Infrastructure services
on the host.
shared Sum of Memory Shared of all powered on VMs and VMware Infrastructure services
on the host.
Since each VM’s Memory Shared measures guest physical memory, the host’s
Memory Shared may be larger than the amount of machine memory if memory is
highly overcommitted (i.e. aggregate VM configured memory is much greater than
machine memory). This illustrates how effective transparent page sharing and memory
overcommitment are for saving machine memory.
sharedcommon Amount of machine memory that is shared by powered on VMs and VMware
Infrastructure services on the host.
Memory Shared - Memory Shared Common = memory savings for the host from
sharing.
overhead Sum of Memory Overhead of all powered on VMs and VMware Infrastructure
services on the host.
balloon Sum of Memory Balloon of all powered on VMs and VMware Infrastructure services
on the host.
swapused Sum of Memory Swapped of all powered on VMs and VMware Infrastructure services
on the host.
swapin Sum of Memory Swap In of all powered on VMs on the host.
swapout Sum of Memory Swap Out of all powered on VMs on the host.
unreserved Memory reservation not used by the Service Console, VMkernel, VMware Infrastructure
services and other powered on VMs’ user-specified memory reservations and overhead
memory.
heap Amount of VMkernel virtual address space dedicated to VMkernel main heap and related
data.
Memory Heap is hardcoded at 30 MB for ESX 3.5U2. This space is used by the
VMkernel for some of its memory plus memory for modules and device drivers. Users
should not worry about this statistic.
heapfree Amount of free machine memory on the VMkernel's main heap.
Memory Heap Free will vary depending on the amount of physical devices and various
configuration options. There is no direct way for the user to increase or decrease this
statistic. Users should not worry about this statistic.
zero Sum of Memory Zero of all powered on VMs and VMware Infrastructure services on
the host.
reservedCapacity Total amount of memory reservation used by powered on VMs and VMware
Infrastructure services on the host, which includes Memory Overhead. Since this
statistic includes Memory Overhead, it will be greater than zero even when no
powered on VM has a user-specified reservation (due to the fact that all powered on VMs
require some overhead memory).
granted Sum of Memory Granted of all powered on VMs and VMware Infrastructure services
on the host.
Since each VM’s Memory Granted measures its guest physical memory, the host’s
Memory Granted may be larger than the amount of machine memory if memory is
overcommitted (i.e. aggregate VM configured memory is greater than machine memory).
consumed Amount of machine memory used on the host. It includes Service Console memory,
VMkernel memory, VMware Infrastructure services memory and VM memory.
sysUsage Amount of machine memory used by the VMkernel for "core" functionality (such as its
own internal uses, device drivers, etc). It does not include memory used by VMs or by
VMware Infrastructure services.

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