6.3

Alert Definition Symptom Recommendations
Virtual machine has unexpected high
memory workload.
Symptoms include all of the
following:
n
Virtual machine memory
workload is at
Warning/Immediate/Critical level
n
Anomaly is starting
to/moderately/critically high
1 Check the guest applications to
determine whether high memory
workload is an expected behavior.
2 Add more memory for this virtual
machine.
Virtual machine has memory
contention due to swap wait and high
disk read latency.
Symptoms include all of the
following:
n
Virtual machine CPU swap wait
is at warning/immediate/critical
level (5/10/15)
n
Virtual machine has
read latency at warning level
n
Recommended virtual machine
memory size
Add more memory for this virtual
machine.
Virtual machine has memory
contention due to memory
compression, ballooning or swapping.
n
! Virtual machine memory limit is
set AND
n
Virtual machine has memory
contention at
warning/immediate/critical level
AN
n
[ Virtual machine memory
ballooning at
warning/immediate/critical level
OR
n
Virtual machine memory is
compressed OR
n
Virtual machine is using swap]
1 Add memory reservations to this
virtual machine to prevent
ballooning and swapping.
2 Use vSphere vMotion to migrate
this virtual machine to a dierent
host or cluster.
Virtual machine has unexpected high
disk I/O workload.
Symptoms include all of the
following:
n
Virtual machine disk I/O
workload at
Warning/Immediate/Critical level
(80/90/95)
n
Virtual machine disk I/O
workload above DT
1 Check the applications running on
the virtual machine to determine
whether high disk I/O workload is
an expected behavior.
2 Use vSphere Storage vMotion to
migrate this virtual machine to a
dierent datastore with higher
IOPS.
Virtual machine has disk I/O read
latency problem.
Symptoms include all of the
following:
n
Virtual machine disk read latency
at Warning /Immediate/Critical
level
n
Virtual machine disk read latency
above DT
n
Virtual machine has low co-stop
n
Virtual machine has low CPU
swap wait
1 Check whether you have enabled
Storage IO control on the
datastores connected to the virtual
machine.
2 Increase IOPS for the datastores
connected to the virtual machine.
3 UsevSphere Storage vMotion to
migrate this virtual machine to a
dierent datastore with higher
IOPS.
Chapter 3 Alert Definitions in vRealize Operations Manager
VMware, Inc. 145