WMI is the Microsoft implementation of Web Based Enterprise Management (WBEM), which is built on the Common Information Model (CIM), a computer industry standard for defining device and application characteristics so that system administrators and management programs can control devices and applications from multiple manufacturers or sources in the same way.Access this complimentary guide to learn how Group Policy and Hyper-V features and capabilities have changed in Windows Server 2016, and discover the key networking, security, and storage benefits these changes offer.

Both of these modes are faster than synchronous mode, which forces programs making that kind of WMI request to wait until WMI returns the data.

When WMI is dealing with a large number of requests, you might notice a slower response because memory usage on the system increases until the retrieved WMI objects are no longer needed by Splunk (after indexing).

More information about how WMI calls are made is available at "Calling a Method", MSDN.

Note: Versions of Splunk prior to 3.4.10 make asynchronous connections to WMI providers.

WMI provides users with information about the status of local or remote computer systems.

It also supports such actions as the configuration of security settings, setting and changing system properties, setting and changing permissions for authorized users and user groups, assigning and changing drive labels, scheduling processes to run at specific times, backing up the object repository, and enabling or disabling error logging.

Splunk makes what are known as semisynchronous calls to WMI providers.

This means that when Splunk makes a call to WMI, it continues running while WMI deals with the request.

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Windows Management Instrumentation (WMI) is a set of specifications from Microsoft for consolidating the management of devices and applications in a network from Windows computing systems.

Make sure that you explicitly allow WMI through on the firewalls on both machines.