Collecting
Performance Data
PDH functions
work with queries and counters. A query is a set of performance counters
that are grouped together so that you can collect their data at the same time.
A counter is a performance data item stored in the Windows NT
Performance Registry. You can call the PdhBrowseCounters function to display the
following PDH dialog box, which lets you browse the available counters.
{bmc bm68.WMF}
For more
information on counters, see Performance Objects and Counters.
A query can
contain one or more counters, and a counter can be contained in more than one
query. To use PDH, you must create queries and add counters to them, as shown
in the following sections.
Creating a query
Collecting data
Displaying data
Ending data collection