eG Monitoring
 

Measures reported by NutClusVMsTest

This test monitors the amount of the physical server's resources that each guest managed by a Nutanix prism is taking up. Using the metrics reported by this test, administrators can determine which virtual guest is taking up most CPU, which guest is generating the most network traffic, which guest is over-utilizing memory, and which guest is eroding disk space.

The measures made by this test are as follows:

Measurement Description Measurement Unit Interpretation
VM_STATE Indicates the current state of the virtual machine.   The table below displays the States that can be reported by this measure, and their numeric equivalents:

Measure Value Numeric Value
Off 0
On 1
Suspended 2

Note:

By default, this measure reports one of the States listed in the table above. The graph of this measure however will represent the VM status using the numeric equivalents - 0 to 2.

Use the detailed diagnosis of the Status measure to view the UUID of the disk and the cluster to which it is attached.
IS_CTRL_VM Indicates whether/not this VM is the controller VM Number The Nutanix CVM is what runs the Nutanix software and serves all of the I/O operations for the hypervisor and all VMs running on that host. Prism service runs on every CVM with an elected Prism Leader which is responsible for handling HTTP requests.

If this measure reports the value 0, it indicates that the VM is not a controller VM, whereas the value 1 indicates that it is a controller VM.
Current_sessions Indicates the number of sessions that are currently active on the guest. Number The value of this measure reveals the guest OS that is currently busy.

The detailed diagnosis of this metric lists the VM name, user of that particular VM, and operating system of VM.
CPU_RESERVED Indicates the amount of CPU power reserved for this VM. GHz  
CPU_USAGE_PERC Indicates the percentage of virtual CPU resources used by this VM. Percent Compare the value of this measure across VMs to know which VM is using the allocated CPU resources excessively.
PHYSICAL_CPU Indicates the percentage of physical CPU that is used by the VM. Percent Ideally, a VM should use only a small percentage of the physical CPU resources of the Nutanix Acropolis host. High CPU usage by a VM could cause other VMs to contend for limited CPU resources, thereby adversely impacting the performance of the other VMs and the applications executing on them. 
VIRTUAL_CPU Indicates the number of virtual CPUs allocated to this VM. Number Compare the value of this measure across VMs to know which VM has been allocated the maximum number of virtual CPUs.
DISK_CAPACITY Indicates the total disk capacity available to this VM. GB A low value is desired for this measure.
DISK_USAGE Indicates the amount of disk space used by this VM. GB  
DISK_USAGE_PERC Indicates the percentage of disk space used by this VM. Percent Comparing the value of this measure across VMs will reveal the VM that is consuming too much disk space.
VIRTUAL_DISK Indicates the number of virtual disks in the VM. Percent Use the detailed diagnosis of this measure to view the details of the virtual disks.
MEM_RESERVED Indicates the amount of memory reserved for this VM. GB  
MEM_CAPACITY Indicates the total amount of memory available to this VM. GB  
MEM_USAGE Indicates the amount of allocated memory capacity currently being used by this VM. GB  
MEM_FREE Indicates the amount of free memory available to this VM. GB Compare the value of this measure across VMs to know which VM is running out of free memory.
MEM_USAGE_PERC Indicates the percentage of allocated memory capacity currently being utilized by this VM. Percent Compare the value of this measure across VMs to know which VM is using memory excessively.
MEM_FREE_PERC Indicates the percentage of free memory available in the VM. Percent Compare the value of this measure across VMs to know which VM is running short of free memory.
NW_ADAPTER Indicates the number of network adapters available to this VM. Number  
NUM_RECEIVED Indicates the amount of data received by this VM. GB  
NUM_TRANSMITE Indicates the amount of data transmitted by this VM. GB  
STORAGE_IOPS Indicates the number of I/O operations per second (IOPS) on this VM. Number This measure is a good indicator of the level of I/O activity on each VM. Compare the value of this measure to know which VM is experiencing an I/O overload.
READ_IOPS Indicates the number of read I/O operations per second on this VM. Number If the value of the STORAGE_IOPS measure is high for a VM, then compare the value of these measures for that VM to know where the bottleneck lies - when reading or writing?
WRITE_IOPS Indicates the number of write I/O operations per second on this VM. Number
IO_LATENCY Indicates the average I/O latency of this VM. Seconds Compare the value of this measure across VMs to know which VM is the slowest in processing I/O requests.
READ_LATENCY Indicates the average read I/O latency for this VM. Seconds If the value of the IO_LATENCY measure is high for a VM, then compare the value of these measures for that VM to know where the bottleneck lies - when reading or writing?
WRITE_LATENCY Indicates the average write I/O latency for this VM. Seconds
IO_BWIDTH Indicates the bandwidth consumed when processing I/O requests to this VM. KB/Sec Compare the value of this measure to know which VM is consuming maximum I/O bandwidth.
READ_BWIDTH Indicates the amount of bandwidth consumed by this VM when processing read I/O requests. KB/Sec If the value of the IO_BWIDTH measure is unusually high for a VM, then compare the value of these measures for that VM to know when maximum bandwidth was consumed - when reading or writing?
WRITE_BWIDTH Indicates the amount of bandwidth consumed by this VM when processing write I/O requests. KB/Sec