vCenter shows alarms "vsphere-ui status changed from green to yellow"

Products

• VMware vCenter Server

Issue/Introduction

"Alarm alarm.HealthStatusChangedAlarm" referencing "vsphere-ui status changed from green to yellow." seen on vCenter 

The below is seen in /var/log/vmware/vsphere-ui/logs/vsphere_client_virgo.log:

vsphere_client_virgo.log:[2025-02-06T14:17:49.206Z] [WARN ] health-status-73              com.vmware.vise.vim.cm.healthstatus.AppServerHealthService        Memory usage: used=523,584,200; max=579,338,240; percentage=90.37625412056349%. Status: YELLOW
vsphere_client_virgo.log:   key = webclient.memory.lowheap,
vsphere_client_virgo.log:   message = The server is running low on heap memory (>90% utilized.)
vsphere_client_virgo.log:[2025-02-06T14:20:49.206Z] [WARN ] health-status-73              com.vmware.vise.vim.cm.healthstatus.AppServerHealthService        Memory usage: used=527,111,792; max=579,338,240; percentage=90.9851543719952%. Status: YELLOW
vsphere_client_virgo.log:   key = webclient.memory.lowheap,
vsphere_client_virgo.log:   message = The server is running low on heap memory (>90% utilized.)
vsphere_client_virgo.log:[2025-02-06T14:23:49.206Z] [WARN ] health-status-73              com.vmware.vise.vim.cm.healthstatus.AppServerHealthService        Memory usage: used=531,680,720; max=579,338,240; percentage=91.77380039681137%. Status: YELLOW

Environment

vCenter 7.x 

vCenter 8.x

Cause

Heap memory of web client service becomes exhausted.

Resolution

Manually increase memory of vsphere-ui service using Manually increasing the heap memory of components in vCenter Server 6.x, 7.x and 8.x