VMware provides preconfigured alarms that trigger when hosts undergo certain conditions and states.

Host Condition and State Triggers lists the default Condition and State triggers you can set on hosts.

Host Condition and State Triggers

Trigger Name

Description

Trigger Type

Connection State

Current connection state of the host:

Connected – The host is connected to the server. For ESX/ESXi hosts, this is always the state.

Disconnected – A user has explicitly shut down the host. In this state, vCenter Server does not expect to receive heartbeats from the host. The next time a heartbeat is received, the host is returned to a connected state and an event is logged.

Not Responding – vCenter Server is not receiving heartbeat messages from the host. After the heartbeat messages are received again, the state automatically changes to Connected. This state is often used to trigger an alarm on the host.

State

Console SwapIn Rate (KBps)

Rate at which the service console kernel is swapping in memory. The Console Swapin Rate indicates memory pressure in the service console.

A high value is generally a precursor to timeout operations. To fix the problem, consider adding more memory or ending the memory-intensive task.

Condition

Console SwapOut Rate (KBps)

Rate at which the service console kernel is swapping out memory. The Console Swapout Rate indicates memory pressure in the service console.

A high value is generally a precursor to timeout operations. To fix the problem, consider adding more memory or ending the memory-intensive task.

Condition

CPU Usage (%)

Amount of physical CPU (MHz) used by the ESX/ESXi host. The calculation is:

Host CPU Usage (%) = CPU usage [MHz] / (# of physical CPUs x clock rate [MHz]) x 100

Condition

Disk Usage (KBps)

Sum of the data read from and written to all disk instances on the host.

Condition

Memory Usage (%)

Amount of physical RAM (MB) consumed by the ESX/ESXi host. The calculation is:

Host Memory Usage (%) = Consumed Memory [MB] / physical RAM of server [MB] x 100

Condition

Network Usage (kbps)

Sum of data transmitted and received for all the NIC instances of the host.

Condition

Power State

Current power state of the host:

Powered On – The host is powered on.

Powered Off – The host is powered off.

Suspended – The host is suspended.

State

Swap Pages Write (KBps)

Rate at which host memory is swapped out to the disk.

Condition