![]() ![]() Some older providers do not follow this rule, so consumers must be able to tolerate non-unique instance names. a provider should not return two instances with the same name as part of a single sample. Instance names should normally be unique within a sample, i.e. ![]() The data for each instance includes the instance name (string) and a set of counter values (integers, one value for each counter in the counterset). A sample consists of timestamps along with the data for instances of the counterset. ![]() For example, the consumer might collect data once per second or once per minute. For example, Windows has a built-in multi-instance counterset named "Processor Information" that reports one instance for each installed CPU.Ĭonsumers will periodically collect and record the data from a provider's counterset. This is common for countersets that report about entities within the system. Multi-instance countersets contain data for a variable number of instances. For example, Windows has a built-in single-instance counterset named "Memory" that reports on global memory usage. This is common for countersets that report system-global statistics. Single-instance countersets always contain data for exactly one instance. A counter value is like a cell in the table. It might be helpful to relate performance counter terms to more familiar spreadsheet terms. When talking about an instance, a counter value might sometimes be called a counter or a value. A counter value is an unsigned integer, either 32-bit or 64-bit depending on the type of the corresponding counter. The instance name would be the database name, and each instance would contain counter values for "transactions per second", "memory usage", and "disk usage" counters.Ī counter value is the value of a single piece of performance counter data. For example, a "per-database statistics" counterset might contain one instance per database. An instance has a name (string) and one or more counter values. For example, a "per-database statistics" counterset might contain a counter named "transactions per second" with type PERF_COUNTER_COUNTER.Īn instance is an entity about which performance data is reported. For example, a performance data provider for a database system might provide a counterset for per-database statistics.Ī counter is the definition of single piece of performance data. In some Windows APIs, countersets are called performance objects. Collecting the data from a counterset returns a number of instances. A counterset has a name and one or more counters. man (XML manifest) file.Ī counterset is a grouping of performance data within a provider. ![]() A V2 provider is installed onto a system via a. A V2 provider is a software component that publishes performance data via the performance counter provider APIs.New providers should use the V2 provider architecture. The V1 provider architecture is deprecated. A V1 provider is installed onto a system via an. A V1 provider is a software component that publishes performance data via a performance DLL that runs in the process of the consumer.For example, a database system might register itself as a performance data provider. A provider will publish data for one or more countersets. Developers can write scripts and applications that access performance counters via performance counter APIs.Ī provider is a software component that generates and publishes performance data. These include Task Manager, Resource Monitor, Performance Monitor, typeperf.exe, logman.exe, and relog.exe. Windows includes several built-in tools that make use of performance data. The Windows Performance Counter system is organized into consumers, providers, countersets, counters, instances, and counter values.Ī consumer is a software component that makes use of performance data. Use Performance Counter Provider APIs when you want to publish performance data from your software component.Use WMI Performance Counter Classes when you want to collect performance data from a local or remote system using WMI.Use Performance Counter Collection APIs when you want to write a script or a program that collects performance data from the local system.Use Performance Counter Tools when you want to collect or view the performance data from a system.The QueryPerformanceCounter function provides optimized access to a high-precision timestamp. Windows Performance Counters provide a high-level abstraction for many kinds of system information. Do not confuse Windows Performance Counters with the QueryPerformanceCounter API. ![]()
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