Capacity is a measurement of the amount of memory, CPU, and disk space for an object. Time remaining is a measure of the amount of time left before your objects run out of capacity. You can turn on and configure the settings for the Capacity Remaining and Time Remaining element for the object types in your policy so that you can override the settings and have vRealize Operations Manager report on the available capacity remaining and the amount of time remaining before resources run out, based on your settings.

How the Capacity Remaining and Time Remaining Element Works

The Capacity Remaining and Time Remaining element determines how vRealize Operations Manager reports on the available capacity and time until resources run out for a specific object type group.

  • The capacity remaining indicates the capability of your environment to accommodate new machines. vRealize Operations Manager calculates the capacity remaining as a percentage of the overall capacity that remains for the number of virtual machines, compared to the total number of virtual machines that can be deployed on the selected object.

  • The time remaining indicates the amount of time that remains before the object group consumes all of the resources. vRealize Operations Manager calculates the time remaining as the number of days remaining until all of the capacity would be consumed, minus the number of days allocated to the provisioning buffer.

  • Usable capacity is a measurement of the percentage of capacity available, minus the capacity affected when you use high availability, and you set capacity buffer amounts on the memory, CPU, network, datastore, and disk space buffers. If you set overcommit values, the usable capacity measurement adds the capacity to the amount of usable capacity available.

  • You can modify the usable capacity settings to use high availability so that vRealize Operations Manager provides enough objects and resources to address throughput and any potential loss of data. You can also modify the calculation type and the buffer rules.

  • Capacity settings for resource containers are enabled or disabled for analysis. For the Memory, CPU, and Disk Space resource containers, you can enable or disable the demand and allocation. For the Network I/O resource container, you can enable or disable the data transmit rate, data receive rate, and the use rate. For the Datastore I/O resource container, you can enable or disable the outstanding I/O requests, reads and writes per second, and the read and write rate. You can also enable or disable the vSphere configuration limit.

  • The peak consideration setting causes vRealize Operations Manager to apply stress settings to account for peak uses in capacity.

  • You can have vRealize Operations Manager account for committed projects that you defined so that you can plan the future capacity of your objects. Because committed projects are scenarios that forecast the future capacity of objects, accounting for committed projects affects the time remaining score.

  • The number of days set for the provisioning time buffer is based on the amount of time you require to provision the objects in your environment, from the time of ordering those objects to deploying them. To keep the Time Remaining score above zero, your objects must have more days of capacity available than the provisioning time buffer.

Where You Override the Policy Capacity Remaining and Time Remaining Element

To view and override the policy Capacity Remaining and Time Remaining analysis setting, in the menu, click Administration, and then in the left pane click Policies. Click the Policy Library tab. Click the Add New Policy icon to add a policy or click the Edit Selected Policy icon to edit a policy. In the Add or Edit Monitoring policy workspace, click Analysis Settings, then select one or more objects in the left pane. The capacity remaining and time remaining settings for the object types that you selected in the workspace appear in the right pane.

View the Capacity Remaining and Time Remaining policy element, and configure the settings for your policy.

If you do not configure the policy element, your policy inherits the settings from the selected base policy.

Table 1. Policy Capacity Remaining and Time Remaining Element Settings in the Add or Edit Monitoring Policy Workspace

Option

Description

Lock icon

Enables you to override the policy element settings so that you can customize the policy to monitor the objects in your environment.

Symptom Thresholds for Time Remaining Score and Capacity Score

Set the symptom threshold values for the policy element to levels that update the badge scores to meet the criteria for your environment. vRealize Operations Manager uses the symptom threshold values to trigger alerts that appear in the Alerts Overview and Dashboard scores.

The badge score symptom threshold for the Capacity Remaining and Time Remaining policy settings appear on the following tabs for a selected object:

  • In the menu, click Environment, and then from the left pane select an object. Click Analysis > Capacity Remaining

  • In the menu, click Environment, and then from the left pane select an object. Click Analysis > Time Remaining

Usable Capacity settings for resource containers

Displays the selected resource containers and resources to include in the analysis, overcommit types and values for resources such as memory and CPU, and the capacity buffer percentage for each resource container.

  • Capacity Buffer %. Defines the percentage of capacity reserved on virtual machines so that the virtual machine does not consume all of its resources. The capacity buffers are defined on Cluster objects and Host objects to reserve some resources for failover.

  • Overcommit. Displays the over commitment type, such as memory or CPU.

  • Value. Displays the amount of over commitment on capacity resources.

To change these settings, select a resource container and double-click the value you want to change.

Additional settings that affect time and capacity remaining calcilations

The available settings depend on the object type you select.

  • High Availability. When selected, vRealize Operations Manager report on the capacity available to the object type group.

    You can have vRealize Operations Manager take into consideration the High Availability (HA) settings.

  • Peak Consideration. When selected, vRealize Operations Manager includes the Stress element in the capacity remaining and time remaining calculations.

  • Committed Projects. When selected, if you committed one or more projects on an object type, and added capacity scenarios to those projects to plan for future capacity requirements, vRealize Operations Manager accounts for the committed projects in the capacity remaining and time remaining calculations.

  • Capacity Calculation. Indicates on what status vRealize Operations Manager reports. You can select either the current value or a trend of values as the basis for the capacity analysis.

  • Provisioning Time Buffer. Indicates the number of days allowed to provision physical or virtual resources. vRealize Operations Manager uses this number to calculate the capacity remaining and time remaining for resource types, and shortens the time remaining scores.

Peak consideration, committed projects, and the provisioning buffer settings, as defined in the applied policy, appear on the following tabs for a selected object.

  • In the menu, click Environment, and then from the left pane select an object. Click Analysis > Capacity Remaining.

  • In the menu, click Environment, and then from the left pane select an object. Click Analysis > Time Remaining.