MEMSZ

Memory Size MBytes

Amount of Physical Memory allocated to a virtual machine. This is the configured virtual machine memory.

MEMSZ = GRANT + MCTLSZ + SWCUR + untouched

Press 'M' to sort by MEMSZ column. 

GRANT

Memory Granted Size MBytes

Amount of physical memory mapped to the virtual machine. If GRANT is lower then MEMSZ, either the guest has never used all of its configured memory or it has been reclaimed by the balloon driver. 

CNSM

Memory Consumed Size MBytes

Amount of the memory consumed by the virtual machine. The memory currently consumed by the virtual machine is equal to the amount of memory that the VM guest operating system currently uses, excluding the amount of memory saved by transparent page sharing and memory compression. 

SZTGT

Target Size MBytes

Targeted amound of physical memory to be allocated. It is possible that SZTGT is higher than MEMSZ because it includes the virtual machine overhead memory. 

TCHD

Touched MBytes

The amount of physical memory recently used (read or write) by the virtual machine. Touched memory is a working set estimate, which indicates how actively the VM is using its memory. This value is similar to the active memory reported by the guest OS. 

TCHD_W

Touched Write MBytes

The amount of physical memory recently written by the virtual machine. 

%ACTV

%ACTV

Active Estimate Percentage of active guest physical memory, current value. 

%ACTVS

Active Slow Estimate

Percentage of active guest physical memory, slow moving average.

%ACTVF

Active Fast Estimate

Percentage of active guest physical memory, fast moving average. 

%ACTVN

Active Next Estimate

Percentage of active guest physical memory, predict of what %ACTVF will be at next sample. 

MCTL?

Memctl?

Memory balloon driver is installed or not. N means no, Y means yes. The ballooning driver is part of VMware Tools.

MCTLSZ

Memctl Mbytes

Amount of physical memory reclaimed from the virtual machine by ballooning. To decrease host memory pressure, the balloon driver inflates inside the virtual machine and makes the physical memory available for other virtual machines. The performance impact caused by ballooning is small and therefore preferred over swapping. Another reason for ballooning can be a configured memory limit (AMAX).

Press 'B' to sort by MCTLSZ column.

MCTLTGT

Memclt Target MBytes

Amount of physical memory the ESXi system attempts to reclaim from the virtual machine by way of ballooning.

MCTLMAX

Memctl Max Mbytes

The maximum amount of guest physical memory reclaimable by the balloon driver

SWCUR

Swap Target MBytes

Target where the ESXi host expects the swap usage by the virtual machine to be.

SWTGT

Swap Target MBytes

Target where the ESXi host expects the swap usage by the virtual machine to be.

SWR/s

Swap Read MBytes/sec

Rate at which the ESXi host swaps in memory from disk for the virtual machine.

SWW/s

Swap Written MBytes/sec

Rate at which the ESXi host swaps virtual machine to disk.

LLSWR/s

Llswap Read MBytes/sec

The rate at which memory is read from the host cache. When host caching is enabled, the ESXi host is able to swap to a local SSD, instead of the virtual machines data store, which significantly reduces the impact caused by swapping.

LLSWW/s

Llswap Written MBytes/sec

Rate at which memory is written to the host cache. When host caching is enabled, the ESXi host is able to swap to a local cache. When host caching is enabled, the ESXi host is able to swap to a local SSD, instead of the virtual machines datastore, which significantly reduces the impact caused by swapping. 

CPTRD

Checkpoint Read MBytes

The amount of data read from the checkpoint file. Data from a checkpoint file is read when a virtual machine is resumed from a suspended state. 

CPTTGT

CPTTGT

Checkpoint Target MBytes

The size of a checkpoint file. The checkpoint file is used when a virtual machine is suspended.

ZERO

Zero MBytes

The size of virtual machine physical pages that are zeroed. A zero page is simply a memory page that is all zeros which can be easily used for page sharing. 

SHRD

Shared MBytes

Amount of guest physical memory that is shared.

SHRDSVD

SHRDSVD

Shared Saved MBytes

Amount of physical memory that is saved due to page sharing.

COWH

Copy on Write Hint MBytes

Amount of guest physical hint pages for page sharing.

OVHDUW

OVHDUW

Overhead OW MBytes

Amount of overhead memory reserved for vmx user world.

OVHDMAX

Overhead Max MBytes

Amount of reserved memory for the entire VM.

MCMTTGT

MCMTTGT

Min Commit Target MBytes

CMTTGT

Commit Target MBytes

CMTCHRG

Commit Charged MBytes

CMTPPS

CMTPPS

Commit Pages Per Share

CACHESZ

CACHESZ

Compressed Memory MBytes

Current size of compressed memory by this virtual machine.

CACHEUSD

Used Compressed Memory MBytes

Used compression memory cache.

ZIP/s

Compression MBytes/sec

Compressed memory per second.

UNZIP/s

Decompression MBytes/sec

Decompressed memory per second.

ID

The virtual SCSI Disk ID. This ID is typically cloaked and the group ID is displayed, unless the group is expanded with the "e" command. It is the same ID as used by vscsiStats.

GID

Group ID

The group ID of the virtual machine. 

VMNAME

Virtual Machine Name

The display name of the virtual machine.

Press 'N' to sort by VMNAME

VDEVNAME

Virtual Device Name

Name of the VSCSI device. Only displayed when the group is expanded with the "e" command.

NVDISK

Number of Virtual Disks

Number of VSCSI devices.

CMDS/s

Commands/sec

Number of commands issued per second.

READ/S

Reads/sec

Number of read commands issued per second.

Press 'r' to sort by READS/s column.

WRITES/s

Writes/sec

Number of write commands issued per second.

Press 'w' to sort by WRITES/s column.

MBREAD/s

MBytes Read/sec

Megabytes read per second. 

Press 'R' to sort by MBREAD/s column.

MBWRTN/s

MBytes Written/sec

Megabytes written per second.

Press 'T' to sort by MBWRTN/s column.

LAT/rd

Read Latency

Average latency (in milliseconds) per write.

LAT/wr

Write Latency

Average latency (in milliseconds) per write.

DEVICE

Device

Name of the storage device.

PATH/WORLD/PARTITION

PATH/WORLD/PARTITION

Path/World/Partition ID

This column is only visible when expanded with either "e" for Disk World Statistics, "P" for Disk Path Statistics or "t" for Disk Partition Statistics.

NPH

Number of Paths

Number of paths to the storage device

NWD

Number of Worlds

Numer of worlds that are running on the storage device. Expand the device with the "e" command to display statistics for individual worlds.

NPN

Number of Partitions

Number of partitions on the storage device.

SHARES

Shares

Number of shares. Only displayed when the device is expanded with the "e" (Disk World Statistics) command.

BLKSZ

Block Size (Bytes)

Physical Device block size in bytes.

NUMBLKS

NUMBLKS

Number of Blocks

Number of blocks of the device.

DQLEN

Device Q Depth

Current device queue depth of the storage device.

WQLEN

World Q Depth - World Queue depth. 

This is the maximum number of ESXi VMkernel active commands that the world is allowed to have. This is per device maximum for the world. It is valid only if the corresponding device is expanded to worlds.

ACTV

Active Commands

Number of commands in the ESXi VMkernel that are currently active. This statistic applies only to worlds and devices.

QUED

Queued Commands

Number of commands in the ESXi VMKernel that are currently queued. This statistic applies to only worlds and devices.

%USD

% Used Percentage of the queue depth used by ESXi VMkernel active commands. This statistic applies only to worlds and devices.

LOAD

Load

Ratio of ESXi VMkernel active commands plus ESXi VMkernel queued commands to queue depth. This statistic applies to only worlds and devices.

CMDS/s

Commands/sec

Number of commands issued per second.

READS/s

Reads/sec

Number of read commands issued per second.

WRITES/s

Writes/sec

Number of write commands issued per second.

MBREAD/s

MBytes Read/sec

Megabytes read per second.

MBWRTN/s

MBytes Written/sec

Megabytes written per second. 

RESV/s

RESV/s

Reserves/sec

CONS/s

Conflicts/sec

DAVG/cmd

Average Driver MilliSec/Command

This is the average response time in milliseconds per command being sent to the device. The DAVG value is part of GAVG. 

KAVG/cmd

Average Kernel MilliSec/Command

This is the amount of time the command spends in the VMkernel. The KAVG value is part of GAVG.

GAVG/cmd

Average Guest MilliSec/Command

This is the response time as it is perceived by the guest operating system. This number is calculated with the formula: DAVG + KAVG = GAVG

QAVG/cmd

Average Queue MilliSec/Command

Average queue latency per command in milliseconds.

DAVG/rd

Average Driver Millisec/Read

Average device driver read latency per read operations in milliseconds.

KAVG/rd

Average Kernel MilliSec/Read

Average ESXi VMkernel read latency per read operation in milliseconds.

GAVG/rd

Average Guest MilliSec/Read

Average Guest operating system read latency per read operations in milliseconds.

QAVG/rd

Average Queue MilliSec/Read

Average queue read latency per read operation in milliseconds.

DAVG/wr

Average Driver Millisec/Write

Average device write latency per write.

KAVG/wr

Average Kernel MilliSec/Write

Average ESXi VMkernel write latency per write in milliseconds.

GAVG/wr

GAVG/wr

Average Guest Millisec/Write

Average guest operating system write latency per write operation in milliseconds.

QAVG/wr

Average Queue MilliSec/Write

Average Queue Write latency per write operation in milliseconds.

FCMDS/s

Failed Commands/sec

FREAD/s

Failed Reads/sec

FWRITE/s

Failed Writes/sec

FMBRD/s

Failed Bytes Read/sec

FMBWR/s

Failed Bytes Written/sec

FRESV

Failed Reserves/sec

ABRTS/s

Aborts/sec

Number of aborted per second.

RESETS/s

Resets/s

Number of commands reset per second.

PAECMDs

PAE Commands/sec

Number of PAE commands per second. This statistic applies to only paths.

PAECP/s

PAE Copies/sec

Number of PAE copies per second. This statistic applies to only paths.

SPLTCMD/s

Split Commands/sec

Number of split commands per second.

This statistic applies only to paths.

SPLTCP/s

Split Copies/sec

Number of split copies per second. This statistic applies to only paths.

CLONE/RD

VAAI Clone Reads

CLONE_WR

VAAI Clone Writes

CLONE_F

VAAI Clone Failed

MBC_RD/s

MBytes Clone Reads/sec

MBC_WR/s

MBytes Clone Writes/sec

ATS

Atomic Test and Set

ZERO

Zeros

ZERO_F

Zeros Failed

MBZERO/s

MBZERO/s

MBytes Zeroed/sec

DELETE

Delete

DELETE_F

Delete Failed

MBDEL/s

MBytes Delete/sec

CAVG/suc

Average Success Latency ms/Clone

CAVG/f

Average Failure Latency ms/Clone

AAVG/suc

Average Success Latency ms/ATS

AAVG/f

Average Failure Latency ms/ATS

ZAVG/suc

Average Success Latency ms/Zero

ZAVG/f

Average Failure Latency ms/Zero

ADAPTR

Adapter

PATH

Path

NPTH

Number of Paths

AQLEN

Adapter Q Depth

CMDS/s

Commands/sec

READS/s

Reads/sec

WRITES/s

Writes/sec

MBREAD/s

MBytes read/sec

MBWRTN/s

MBytes Written/sec

RESV/s

Reserves/sec

PORT-ID

Port ID

The port ID used on the virtual switch. This ID is used for example for network traces with pktcap-uw.

Press 'N' to sort by PORT-ID column.

UPLINK

Uplink?

This virtual switch port is a physical uplink port. N means no, Y means yes.

UP

Link Up?

Y mean the corresponding link is up. N mean it is not. Only visible for uplink ports. 

SPEED

Link Speed (Mb/s)

Link speed in Megabits per second. Only visible for uplink ports.

FDUPULX

Full Duplex?

Y mean the corresponding link is operating at full duplex. N mean it is not. Only visible for uplink port. 

USED-BY

Used by

Indicates what is connect to the virtual switch port. Connected devices can be virtual machine NICs, VMkernel ports (VMK#), physical NICs (VMNIC#) or ports used for health checks (Shadow of vmnic#).

TEAM-PNIC

Team Up-link Physical NIC Name

The physical NIC that corresponding device is actively using. This information is helpful for network troubleshooting. 

DNAME

Device Name

Virtual Switch Name. Either displayed name for virtual switches or dVSPortset-# for distributed switches.

PKTTX/s

PKTTX/s

Packets Transmitted/sec

Number of packets transmitted per second

Press 't' to sort by PKTTX/s column.

MbTX/s

MBits Transmitted/sec

Megabits transmitted per second.

Press 'T' to sort by MbTX/s column.

PSZTX

Average Packet Size Tranmitted (Bytes) 

Average size of transmitted packets in bytes. 

PRTRX/s

Packets received/sec

Number of packets received per second. 

Press 'r' to sort by PKTRX/s

MbRx/s

MBits Received per second.

Press 'R' to sort by MbRx/s column.

PSZRX

Average packet Size Received (Bytes)

Average size of received packets in bytes.

%DRPTX

%Outbound Packets Dropped

Percentage of transmit packets dropped.

%DRPRX

%Received Packets Dropped

Percentage of receive packets dropped.

ACTN/s

Actions Posted/sec

Number of Vmkernel actions posted per second. This is a VMware internal counter with no further documentation.

PKTTXMUL/s

Multicast Packets Transmitted/sec

Number of multicast packets transmitted per second.

PKTRXMUL/s

Multicast Packets Received/sec

Number of multicast packets received per second.

PKTTXBRD/s

Broadcast Packets Transmitted/sec

Number of broadcast packets transmitted per second.

PKTRXBRD/s

PKTRXBRD/s

Broadcast Packets Received/sec.

Number of broadcast packets received per second. 

ID

ID

The ID of a running world. The world ID is typically cloaked and the group ID is displayed, unless the group is expanded with the "e" command. This also applies to groups with a single world. The ID is never identical to the GID. 

GID

Group ID

The Group ID is a running world. A group is sometimes also referred as Resource Pool, which has nothing in common with the Resource Pools you can configure in a DRS Cluster.

Press 'N' to sort by GID column.

LWID

LWID

Leader World ID

The Leader World ID, also known as VMX Cartel ID for Virtual Machines. The LWID typically the first world that has been started in a group.

NAME

Name

The name of a World's group. The number appended to the name is the LWID. When the group is expanded with the "e" command, the name f the World is displayed.

NWLD

NWLD

Number of Worlds

The number of worlds running in a Group. NWLD is 1 when either Group as a single process, or when the group has been expanded with the "e" command.

%USED

Used

Percentage of physical CPU core cycles used by the world or group. %USED depends on the frequency the CPU core is running with and can be higher or lower compared to %RUN when the normal (rated) frequency differs. Groups can also be higher than 100% when move vCPUs are configured or there is a high %SYS usage.

%USED = %RUN + %SYS -%OVRLP

Press 'U' to sort by %USED column.

%RUN

Run

Percentage of total scheduled time for the world to run. %RUN does not account hyperthreading and system time. On a hyperthreading enabled server, %RUN can be twice as large as %USED

The main difference between %RUN and %USED is that %RUN does not account for system time. 

%SYS

System percentage of time spent by the ESXi VMkernel on behalf of the world to process interrupts and to perform other system activities. A high %SYS usually means high IO.

%WAIT

Wait

Percentage of time a world spent in the blocked or busy wait state. This percentage also includes %IDLE. The theoretical maximum of %WAIT is (NWLD*100). It's nothing wrong when there is high value because the idle time is included in %WAIT. 

%VMWAIT

Virtual Machine Wait

The total percentage of time a world spent in a blocked state waiting for events. The %VMWAIT metric is only available for vCPUS or combined in a VM group.

For vCPUS when a Virtual Machine is expanded with the "e" command, %WAIT = %VMWAIT + %IDLE + %SWPWT

%RDY

Ready

The percentage of time the world was ready to run but waiting in a queue to be scheduled. This may happen even when there is plenty of free CPU cycles when a VM CPU is administratively limited which is shown by %MLMTD

To determine CPU contention from %RDY you have to take into account %RDY, MLMTD and the number of vCPUS. If % RDY - %MLMTD is higher than 10% per vCPU, you are very likely experiencing CPU contention. Typically you want to see %RDY close to 0.

100% = %RUN + %RDY + %CSTP + %WAIT

Press 'R' to sort by %RDY column.

%IDLE

Idle

The percentage of time the vCPU world is in an idle loop. %IDLE is only availble for vCPU worlds. Other worlds do not have idle loops, so %IDLS is 0. 

%OVRLP

Overlap

The percentage of time spent by system services on behalf of other worlds. For example, if VM A is currently being scheduled and a network packet for VM B is processed by the ESXi VMkernel, the time spend appears as %OVRLP for Virtual Machine A and %SYS for Virtual Machine B

%CSTP

CoStop

The percentage of time that a VM is ready to run but is waiting for the availability of other vCPUs. The co-deschedule state applies only for SMP VMs. The CPU scheduler might put a vCPU in this state, when the VM workload does not use vCPU in a balanced fashion. For example, if you have a VM with 2 vCPUs runin gon non SMP aware application, utilizing 1 vCPU at 100% and 1 vCPU at 0%. In that case, the CPU scheduler penalties the VM to reduce resource shortage for other VMs. This is represented as %CSTP

%MLMTD

%MLMTD

Max Limited

The percentage of time a world was ready to run but deliberately wasn't scheduled because doing so would violate the resource pool or virtual machine CPU limit. The %MLMTD time is included in %RDY time. If the value is not 0, the VM has been administratively limited. 

%SWPWT

Swap Wait

The percentage of time a world spends waiting for the VMkernel to swap memory. The %SWPWT time is included in the %WAIT time. If %SWPWT is greater then 0, VMkernel is swapping the VMs memory to the disk. This will have a large negative impact in overall performance. Swapping can be caused by high memory over subscription or memory limits configured on a resource pool or VM.

SWTCH/s

Switches/sec

Number of world switches per second. A context switch occurs when a CPU switches the execution from one world to another. 

MIG/s

Migrates/sec

Number of migrations per second.

A world can be migrated from a busy pCPU to a less loaded pCPU for load balancing. 

QEXP/s

Quantum Expires/sec

Number of quantum expirations per second. This happens when a time quantum given to a currently running world expires. It is common that a world changes its state to WAIT before the current time quantum expires (50ms).

WAKE/s

Wakeups/sec

Number of world wake-ups per second. A world wakes up when its state is changed from WAIT to READY.

AMIN

Alloc Min

Resource Pool, Virtual Machine, or world attribute reservation. A value of 0 means no reservation.

AMAX

Alloc Max

Resource pool, virtual machine, or world attribute limit. A value of -1 means unlimited.

ASHRS

Allocate Shares

Resource pool, virtual machine, or world attribute Shares. Default shares are -4 (High), -3 (Normal), and -2 (Low). When a custom share is configured, the value is displayed. 

AMLMT

Alloc Min Limited

Undocumented parameter

AUNITS

Allocated unit

Allocation unit (MHZ for virtual machines)

%LAT_C

Latency CPU

The percentage of time the Resource Pool/World was ready to run but was not scheduled to run because of cpu resource contention. 

%LAT_M

Latency Memory

The percentage of time the Resource pool/World was ready to run but was not scheduled to run because of memory resource contention.

%DMD

Demand

The CPU demand in percentage. it represents the average active CPU load in the past 1 minute. 

EMIN

Effective Min

Effective minimum CPU allocation in case of resource contention. This is the amount of MHz the world will receive when virtual machines are competing for resources. 

TIMER/s

Timer/sec

Timer Rate for this world. 

AFFINITY_BIT_MASK

Affinity Bit Mask

Bit mask showing the current scheduling affinity for the world. 

CPU

CPU

The physical or logical processor on which the world was running when resxtop or esxtop obtained this information.

HTSHARING

HT Sharing

Current Hyper-threading configuration. 

HTQ

HT Quarantine

Indicates wheather the world is currently quarantined or not. N means no Y means yes. 

POWER

Power Usage Watts

Current CPU power consumption for a virtual machine (in Watts). Usage Calculation is base don the value provided by the power supply.

NHN

Numa Home Nodes

Current home node for the resource pool or virtual machine. 

This statistic is applicable only on NUMA systems. If the virtual machine has no home node, a dash (-) appears. A virtual machine runs only on porocessors within its home node, and is newly allocated memory comes from the home node as well. A virtual machine can have multiple home nodes when the number of virtual CPUs exceeds the number of cores per physical socket.

NMIG

Numa Rebalance Count Delta

NRMEM

Numa Local Memory MBytes

Amount of local memory allocated to the virtual machine.

N%L

Numa % Local

Percentage of local memory allocated to the virtual machine. This value should be close to 100%. A reason for poor NUMA locality can be that a virtual machine has more memory configured than it is available for each processor. Accessing remote memory causes increased latency.