2.3.15 Data that can be collected with virtualized systems that use VMware/Hyper-V
VMware/Hyper-V is software that provides virtualized systems on the Intel architecture. Since it provides virtualized systems implemented in software, it is a general purpose implementation that can run flexibly on several environments.
- Organization of this subsection
(1) VMware/Hyper-V functionality
Like other virtualized systems, the functionality provided by VMware includes the following:
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Virtual networks
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Virtual processors
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Virtual memory
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Virtual disks
VMware/Hyper-V manages the above functionality to implement a virtual machine (VM). The created VM is recognized as a single host from other hosts, and can be treated the same as a physical machine.
Because multiple VMs can be created and run, operating systems like Linux and Windows can be run concurrently.
(2) Using PFM - Agent for Platform on VMware/Hyper-V
Keep the following in mind when using PFM - Agent for Platform on VMware/Hyper-V.
- Installing PFM - Agent for Platform
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To use PFM - Agent for Platform, install it on the guest OS.
- Processor information
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In a virtualized system, if sufficient resources are not allocated to the host OS, impact will extend to the operation of the host OS. In particular, processor resources are likely to involve overload, and it might be difficult to determine whether the processor resources allocated to the VM are insufficient, or whether the host OS processor resources are insufficient.
VMware/Hyper-V also supports a feature that enables upper and lower limits to be set for processor usage allocation. This can result in wide swings in usage when resource switching is performed automatically within a set range.
If this seems to be the case, monitor items that are not easily impacted by dynamic changes to processor resources, such as the current queue length.
- Memory
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Be careful when setting an alarm for memory as a resource that can be changed dynamically. Even when the amount of memory used is fixed, if the allocated memory resources are reduced, memory usage will grow, and might cause alarms to be notified unintentionally.
- Devices
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Disk performance data is only for logical partition groups on the guest OS. System-wide performance data that includes the host OS cannot be collected. For the network adapter information, information about network adapters allocated to the guest OS is obtained.