vSphere UI Health Alarm and How to Check vSphere Health

Customers could use vSphere Health Check to detect alarms quickly and as well as any potential issues.


By Crystal / Updated on March 16, 2023

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Case: vSphere UI Health Alarm

   Hi all,

Today I saw a warning in my vCenter: "vSphere UI Health Alarm". When I look into the vCenter Appliance Management, I can see that there is a warning at the VMware vSphere Client service. It says: "The server is running low on heap memory (>90% utilized.)".

Can anybody help to solve this?

Thanks a lot. 

The vSphere UI (VMware vSphere Client Service) is responsible for connecting to ESXi hosts and vCenter Server systems. If the vSphere UI Health Alarm fires, you could check whether the VMware vSphere Client Service is running. In case the service is stopped, you are able to try restarting vCenter services again.

vsphere ui health alarm

In order to monitor the health of the system, vSphere Health Check plugin that was included in vSphere 6.7.

How to Check vSphere Health in vSphere Client

When vSphere 6.7 had initially shipped, there were only 5 vSphere Health Checks. It evolves over time, and now as of late vSphere Health contains ~30 different health checks that can be run against a vSphere environment. To run health checks, you should know the prerequisites.

  • You must participate in the Customer Experience Improvement Program to use online health checks.
  • To perform the online health checks, vCenter Server must be able to communicate over the Internet.

Note: If Customer Improvement Experience Program (CEIP) is not enabled, the Internet connectivity check is unavailable.

Steps to Check vSphere Health

The vSphere Health plugin is located at the vCenter Server from the Hosts & Clusters view.

1. Navigate to Monitor->Health as shown in the screenshot below.

vsphere health

2. Expand Online health to check the categories.

3. Select the type of information to view.

 select the type

vSphere periodically retests the health check and updates the results.

4. To run the health checks and update the results immediately, click the Retest button.

Seamless Data Protection for Your vSphere VMs

vSphere enables administrators to conveniently manage virtualized servers and operating systems all from a single client. However, no one could avoid accident. Data protection has always been a hot topic since it is considered as the life of company.

AOMEI Cyber Backup is a comprehensive VM backup solution that can easily manage backups of virtual machines with one console and accommodate different virtual environment scales.

With its powerful features, it has gained a good reputation among customers. It supports not only VMware vSphere backups, but also Hyper-V backups.

Auto Backup: Automatically backup virtual machines on regular basis - daily, weekly, monthly.
Easy-to-use: Manage VM backup and recovery from central console without complicated reinstallation and complication.
Flexible Backup Strategy: Create full / incremental/ differential backups to protect data comprehensively and save storage.
Multiple Storage Destinations: Easily backup to local or network destinations.
Email notification: Send email notification when the task is completed or abnormal.

dashboard manage view

AOMEI Cyber Backup supports VMware ESXi 6.0 and later versions. You can click the following button to download the 30-day free trial.

Download Free TrialVMware ESXi & Hyper-V
Secure Download

*You can choose to install this VM backup software on either Windows or Linux system.

5 easy steps to backup and restore VMware ESXi VMs

1. Bind Devices: Access to AOMEI Cyber Backup web client, navigate to Source DeviceVMware > + Add VMware vCenter or Standalone ESXi host. And then click Bind Device.

add vmware esxi device

2. Create Backup Task: Navigate to Backup Task > + Create New Task, and then select VMware ESXi Backup as the Device Type.

  • Task Name: you can change the task name or use the default name with an ordinal.
  • Device: batch select large numbers of VMs managed by vCenter Server for centralized backup.
  • Target: select to back up to a local path, or to a network path.
  • Schedule: choose to perform full, differential or incremental backup, and automate execution according to the frequency you specified.
  • Cleanup: automatically delete the old backup copies that exceed the retention period you specified.

Backup schedule type

3. Run Backup: Click Start Backup and select Add the schedule and start backup now, or Add the schedule only.

Start Backup

4. Restore from Backup: Navigate to the backup task you want to restore, click Restore to open the wizard.

Or you can click Backup Management > History Versions. Specify a VM and select a restore point from the left list.

Restire from backup task

5. Start Restore: Choose to Restore to original location or Restore to new location. And click Start Restore to recover the virtual machine in place.

Restore to new location: Create a new VM in the same or another datastore/host directly from the backup to perform out-of-spacre recovery, saves the trouble of re-configuring the new VM.

Restore to new location


vSphere Health can be very valuable for VMware customers as it allows the environment to gain self-intelligence as well as dramatically reduce potential configuration mistakes and datacenter vulnerabilities.

Crystal · Editor
Crystal is an editor from AOMEI Technology. She mainly writes articles about virtual machine. She is a positive young lady likes to share articles with peolpe. Off work she loves travelling and cooking which is wonderful for life.