LogicalDisk\% Disk Time

PhysicalDisk\Disk Reads/sec

PhysicalDisk\Disk Writes/sec

Use diskperf -y to enable disk counters and diskperf -n to disable them. To specify the type of counters you want to activate, include d for physical disk drives and v for logical disk drives or storage volumes. When the operating system starts up, it automatically sets the diskperf command with the -yd switch to activate physical disk counters. Type diskperf -yv to activate logical disk counters. For more information about using the diskperf command, type diskperf -? at the command prompt.

The % Disk Time counter must be interpreted carefully. Because the _Total instance of this counter might not accurately reflect utilization on multiple-disk systems, it is important to use the % Idle Time counter as well. Note that these counters cannot display a value exceeding 100 percent.

For more information about disk performance counters, see "Examining and Tuning Disk Performance" in this book.

PhysicalDisk\Avg. Disk Queue Length (all instances)

Memory\Cache Bytes

You can also use Memory\Committed Bytes and Memory\Commit Limit to detect problems with virtual memory.

Memory\Page Faults/sec

Memory\Pages Input/sec

Memory\Page Reads/sec

Memory\Transition Faults/sec

Memory\Pool Paged Bytes

Memory\Pool Nonpaged Bytes

Although not specifically Memory object counters, the following are also useful for memory analysis:

Paging File\% Usage Object (all instances)

Cache\Data Map Hits %

Server\Pool Paged Bytes and Server\Pool Nonpaged Bytes

Note that you need to install the Network Packet Protocol driver for Network Monitor in order to use this counter.

Network Interface\Bytes total/sec

Network Interface\Packets/sec

Server\Bytes Total/sec or Server\Bytes Sent/sec and Server\Bytes Received/sec

You might want to monitor other objects for network and server throughput, as described in "Monitoring Network Performance" in this book..

Processor\Interrupts/sec

System\Context switches/sec