Alert Definition Symptoms Recommendations
Standalone host has memory
contention caused by overpopulation
of virtual machines.
Symptoms include the following:
n Host inside a cluster
n Host memory workload at
warning/immediate/critical level
n Host memory contention at
warning/immediate/critical level
n = 0 child virtual machines
have [Virtual machine memory
workload at warning/ immediate/
critical level]
1 Add the host to a fully-automated-
DRS cluster to allow vSphere to
move virtual machine as needed
when resources are available on
other hosts in the cluster.
2 Use vMotion to migrate some
virtual machines with high CPU
workload to other hosts that have
available CPU capacity.
3 Upgrade the host to use a host
that has larger memory capacity.
4 Right-size large virtual machines
as it helps in reducing overall
resource contention. Use the
Reclaimable Capacity feature
within vRealize Operations for
recommended rightsizing of VMs.
Host in a cluster that does not have
fully-automated DRS enabled has
memory contention caused by less
than half of the virtual machines.
Symptoms include the following:
n [DRS Enabled OR ! DRS fully
automated]
n Host memory contention at
warning/immediate/critical level
n > 0 child virtual machines
have [Virtual machine memory
workload at warning/ immediate/
critical level]
n <= 50% of child virtual machines
have [Virtual machine memory
workload at warning/ immediate/
critical level]
1 Enable fully-automated DRS in the
cluster to allow vSphere to move
virtual machine as needed when
resources are available on other
hosts in the cluster.
2 Use vMotion to migrate some
virtual machines with high CPU
workload to other hosts that have
available CPU capacity.
3 Right-size large virtual machines
as it helps in reducing overall
resource contention. Use the
Reclaimable Capacity feature
within vRealize Operations for
recommended rightsizing of VMs.
Host in a cluster that does not have
fully-automated DRS enabled has
memory contention caused by more
than half of the virtual machines.
Symptoms include the following:
n Host inside a cluster
n [DRS Enabled OR ! DRS fully
automated]
n Host memory workload at
warning/immediate/critical level
n Host memory contention at
warning/immediate/critical level
n > 50% of child virtual machines
have [Virtual machine memory
workload at warning /immediate/
critical level]
1 Enable fully-automated DRS in the
cluster to allow vSphere to move
virtual machine as needed when
resources are available on other
hosts in the cluster.
2 Use vMotion to migrate some
virtual machines with high CPU
workload to other hosts that have
available CPU capacity.
3 Upgrade the host to use a host
that has larger memory capacity.
4 Right-size large virtual machines
as it helps in reducing overall
resource contention. Use the
Reclaimable Capacity feature
within vRealize Operations for
recommended rightsizing of VMs.
Definitions for Metrics, Properties, and Alerts
VMware, Inc. 389