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This article provides information on using the sizing guidelines for vRealize Operations Manager 7.5, to determine the configurations used during installation, or post install.
By default, VMware offers Extra Small, Small, Medium, Large, and Extra Large configurations during installation. You can size the environment according to the existing infrastructure to be monitored. After the vRealize Operations Manager instance outgrows the existing size, you must expand the cluster to add nodes of the same size. vRealize Operations NodeRemote Collector (RC)Extra SmallSmallMediumLargeExtra LargeStandardLargeConfigurationvCPU248162424Default Memory (GB)8163248128416Maximum Memory Configuration (GB)8326496128832vCPU: Physical core ratio for data nodes (*)1 vCPU to 1 physical core at scale maximumsNetwork latency for data nodes (******)< 5 msNetwork latency for remote collectors (******)< 200 msNetwork latency for agents (to vRealize Operations node or RC) (******)< 20 msDatastore latencyConsistently lower than 10 ms with possible occasional peaks up to 15 msIOPSSee the attached Sizing Guidelines worksheet for details.Disk SpaceObjects and MetricsSingle-Node Maximum Objects3505,00015,00020,00045,0006,000 (****)32,000 (****)Single-Node Maximum Collected Metrics (**)70,000800,0002,500,0004,000,00010,000,0001,200,0006,500,000Maximum number of nodes in a cluster1281666060Multi-Node Maximum Objects Per Node (***)N/A3,0008,50016,50040,000N/AN/AMulti-Node Maximum Collected Metrics Per Node (***)N/A700,0002,000,0003,000,0007,500,000Maximum Objects for the configuration with the maximum supported number of nodes (***)3506,00068,000200,000240,000Maximum Metrics for the configuration with the maximum supported number of nodes(***)70,0001,400,00016,000,00037,500,00045,000,000End Point Operations agentMaximum number of agents per node1003001,2002,5002,5002502,000vRealize Application Remote Collector (*****) telegraf agentMaximum number of agents per node1005001,5003,0004,0002502,500Network latency for Application Remote Collector (to vRealize Operations node or RC)<10ms * It is critical to allocate enough CPU for environments running at scale maximums to avoid performance degradation. Refer to the vRealize Operations Manager Cluster Node Best Practices in the vRealize Operations Manager 7.5 Help for more guidelines regarding CPU allocation.** This is the total number of metrics from all adapter instances. To get this number, go to the Administration page, expand History and generate an Audit Report.*** In large configurations with more than 8 nodes, the maximum metrics and objects have been reduced to permit some head room. This adjustment is accounted for in the calculations.**** Based on the VMware vCenter adapter.***** vRealize Application Remote Collector discovers applications running on Virtual Machines and collects run-time metrics of the operating system and applications.****** The latency limits are provided in Round Trip Time (RTT). What's new in vRealize Operations Manager 7.5 sizing New way to monitor operating systems and applications: Telegraf agents using vRealize Application Remote CollectorPerformance Improvement with the same footprint: Up to 15% vCPU usage reduction vRealize Application Remote Collector Maximums SmallMediumLargevCPU4816Default Memory (GB)81624Maximum Number of supported telegraf agents5003,0006,000 Note: Note: vRealize Application Remote Collector can be configured for many vCenters, although each of those vCenters can only be monitored by one Application Remote Collector.If you have more than 6K telegraf agents increase vCPU and Memory of the Large configuration to monitor up to 10K telegraf agents. Consider having 20% free vCPU while installing 1K telegraf agents simultaneously as the vCPU usage of vROps VM will be increased 10-18%.The increase of memory usage depends on the number of services and their configurations on the monitored VM. Memory usage will be increased at least 1-1.5 GB when monitoring 1K OS objects. Important Notes The sizing guides are version specific, please use the sizing guide based on the vRealize Operations version you are planning to deploy.An object in this table represents a basic entity in vRealize Operations Manager that is characterized by properties and metrics that are collected from adapter data sources. Example of objects include a virtual machine, a host, a datastore for a VMware vCenter adapter, a storage switch port for a storage devices adapter, an Exchange server, a Microsoft SQL Server, a Hyper-V server, or Hyper-V virtual machine for a Hyperic adapter, and an AWS instance for a AWS adapter. Other Maximums Maximum number of remote collectors60 Maximum number of vCenter adapter instances120 Maximum number of vCenter on a single collector100 Maximum number of concurrent users per node (*)10This is when the cluster is running with all nodes filled with objects or metrics at maximum levels on a 4 large node cluster.Maximum number of certified concurrent users (**)300 Maximum number of the vRealize Application Remote Collector telegraf agents10,000 Maximum number of the End Point Operations agents10,000 * The maximum number of concurrent users is 10 per node with objects or metrics at maximum levels (For example, 16 nodes Large with 200K objects can support 160 concurrent users).** The maximum number of concurrent users is achieved on a system configured with the objects and metrics at 50% of supported maximums (For example, 4 nodes Large with 32K object). VDI use case A large node can collect up to 20,000 vRealize Operations for Horizon objects when a dedicated remote collector is used.A large node can collect up to 20,000 vRealize Operations for Published Apps objects when a dedicated remote collector is used. Constraints Extra small configuration is designed for test environments and POC, we do not recommend to scale up an extra small node horizontally.If you have >1 node, then all nodes must be scaled equally. No mixing of nodes with different sizes.Snapshots impact performance. Snapshots on the disk causes slow IO performance and high CPU co-stop values which degrades the performance of vRealize Operations.In HA, each object is replicated in some nodes of a cluster, hence the limit for HA based instance is two times less compare to non HA. vRealize Operations HA supports only one node failure. Avoid single-point-of-failure by putting each nodes into different hosts in the vSphere cluster. Scaling Tips Scale up vertically (adding more vCPU/Memory), not horizontally (adding more nodes). Use the configuration which has the least number of nodes.Example: For 180000 objects, deploy as 4 Extra Large nodes instead of 12 Large nodes. You will save half the CPU. You can increase RAM size instead of increasing both RAM and CPU. This is useful if the number of objects is close to the upper limit. Check that there is enough RAM on the underlying hardware.Example: Large node has 48GB and the number of objects are closed to 20000. You can increase up to 96 GB. This assumes the underlying ESXi has >96 GB per socket. Scale down CPU configuration. The cluster will perform better if the nodes stay within a single socket (don't cross NUMA boundaries).Example: Reclaim up to 4 vCPUs from the Large and Extra Large node VMs if the cluster is not running at the upper limits, and the CPU usage in node VMs is less than 60%. Collectors The collection process on a node will support adapter instances where the total number of objects is not more than 3,000, 8,500, 16,500 and 40,000 on small, medium, large and extra large multi-node vRealize Operations Manager clusters respectively.For example, a 4-node system of medium nodes will support a total of 34,000 objects.However, if an adapter instance needs to collect 12,000 objects, a collector that runs on a medium node cannot support that as a medium node can only handle 8,500 objects. In this situation, you can add a large remote collector and pin the adapter instance to the remote collector or scale up by using a configuration that supports more objects.
Recommended sizing can be checked by inputting values on vropssizer.vmware.com, or by inputting values on the attached spreadsheet.