Hosts View & Actions

The Hosts view is a display of all the virtualization hosts associated with all hypervisor connections that have been added to the console. This view includes a wealth of performance counters that are retrieved directly from the hypervisor. This gives you the ability to see the performance statistics of the host directly, without having to install or run the hypervisor management program. This can be very helpful for first-level or first contact hypervisor troubleshooting.

Hosts View Column Reference

Some VMware host statistics require statistics level 3 to be defined in vCenter. For more information on setting statistics levels in vCenter, please refer to the appropriate VMware documentation.
Some XenServer statistics require XenServer v6.2 or v6.1 with the Performance Monitoring Enhancement Pack, CTX135033.

Active Memory

Sum of all memory that is actively used for all VMs, including vSphere services on the host. (VMware only)

Consumed Memory

The total consumed memory for all running virtual machines. (for VMware hosts, this includes memory used by the Service Console, the VMkernel, and vSphere services)

CPU Cores

Total number of CPU cores in the host.

CPU Sockets

Total number of physical processors in the host.

CPU Usage %

Actively used CPU cycles of the host as a percentage of the total available CPU cycles on the host.

Datastore R/W IOPs

Aggregate number of IO operations on the datastore. The value displayed belongs to the datastore with the highest number of IOPs

(Xen: off by default – must enable on all SRs on all hosts [xe host-data-source-record data-source=iops_total_<sr-short-uuid> uuid=<host-uuid> ] )

Datastore Read latency

Average amount of time for a read operation from the VMware datastore. The value displayed belongs to the datastore with the highest read latency. (VMware only)

Datastore Read Rate

Rate of reading data from the datastore or SR. The value displayed belongs to the datastore with the highest read rate.

(Xen: off by default – must enable on all SRs on all hosts [xe host-data-source-record data-source=io_throughput_read_<sr-short-uuid> uuid=<host-uuid> ] )

Datastore Write latency

Average amount of time for a write operation to the VMware datastore. The value displayed belongs to the datastore with the highest write latency. (VMware only)

Datastore Write Rate

Rate of writing data to the datastore or SR. The value displayed belongs to the datastore with the highest write rate.

(Xen: off by default – must enable on all SRs on all hosts [xe host-data-source-record data-source=io_throughput_write_<sr-short-uuid> uuid=<host-uuid> ] )

(VMware 4.1: requires statistics level 3)

Disk device latency

Average amount of time, in milliseconds, to complete a SCSI command from the physical device (block storage only). The value displayed belongs to the disk with the highest latency. (VMware only)

Disk kernel latency

Average amount of time, in milliseconds, spent by the VMkernel processing each SCSI command (block storage only). The value displayed belongs to the disk with the highest latency. (VMware only)

Disk Queue Depth

Average amount of time spent in the VMkernel queue, per SCSI command, during the collection interval (block storage only). The value displayed belongs to the disk with the highest latency.

(Xen: disabled by default – must enable on all SRs on all hosts [xe host-data-source-record data-source=avgqu_sz_<sr-short-uuid> uuid=<host-uuid> ] )

Folder Path

The location of the hypervisor in ControlUp organizational hierarchy

Hypervisor Platform

The hypervisor platform type for the host

Hypervisor Version

Hypervisor version

Installed Memory

The amount of physically installed RAM on the host.

Max Free Space Datastore

Amount of free space available on the least occupied datastore

Min Free Space Datastore

Amount of free space available on the most occupied datastore

Name

The name of the virtualization host

NIC dropped received packets

Number of received packets dropped during the collection interval.

(Xen: disabled by default – must enable for each NIC to track (eth0, eth1, etc) [xe host-data-source-record data-source=pif_eth0_rx_errors uuid=<host-uuid> ] )

NIC dropped transmitted packets

Number of transmitted packets dropped during the collection interval.

(Xen: disabled by default – must enable for each NIC to track (eth0, eth1, etc) [xe host-data-source-record data-source=pif_eth0_tx_errors uuid=<host-uuid> ] )

NIC received packets errors

Number of inbound packets with errors. If the error counts grow rapidly you might have too much load on the system or some problem in end- to-end connectivity (including hardware)

NIC transmitted packets errors

Number of outbound packets with errors. If the error counts grow rapidly you might have too much load on the system or some problem in end- to-end connectivity (including hardware)

NIC Usage

Sum of data transmitted and received across all physical NIC instances connected to the host.

Running VM Count

Number of VMs running on this host.

Storage Repository total latency

Average amount of time for an operation (read or write) to the XenServer SR. The value displayed belongs to the SR with the highest latency. (XenServer only)

(Xen: disabled by default – must enable on all SRs on all hosts [xe host-data-source-record data-source=latency_<sr-short-uuid> uuid=<host-uuid> ] )

Stress Level

Stress Level is a flexible load measure which you can customize using the "Stress Settings" pane

Unmanaged VM Count

Number of VMs on the host that are not managed by ControlUp.

vCPU/pCPU Ratio

Shows the ratio of the total number of vCPUs assigned to all VMs running on a host, to the number of physical cores

VM Count

Number of VMs assigned to this host.

Objects in the Hypervisors folder

All objects (pools, datacenters, clusters, etc) in the Hypervisors branch of the organization tree behave as folders for the purpose of organizing the view of hosts and computers. As such, you can focus on any object in order to view only the hosts, computers, and other items, just as you can do in other ControlUp folders.

Folders in the Hypervisors branch of the organization tree exist to organize or segregate the hypervisor connections, if desired.

Drill down behavior for hosts

When you are in the Hosts View, if you double-click on a host it shows the VMs that are guests on that host. The list of computers shown varies slightly, depending on which hypervisor you are connected to.

  • In a VMware environment, you will see all of the VMs associated with that host, whether or not they are powered on, just as you would in the vSphere client.
  • In a XenServer environment, you will see VMs running on that host as well as VMs with an affinity for that host, whether or not they are powered on. VMs that are powered off and have no host affinity will not be seen when double-clicking on a host just as you would see in XenCenter, where they belong to the pool itself and not a host. In order to see all of the VMs in a XenServer pool regardless of power state or affinity, focus on the XenServer pool, and choose the Computers View without double-clicking on the Xen hosts in that pool.
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