Performance Counters & System Utility
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46 Terms
What is the first step to configure a counter log in Performance Monitor?
Choose the resources to monitor
How are resources like memory and disks grouped in Performance Monitor?
Into objects
What do objects contain in Performance Monitor?
Counters that represent various performance statistics
Can multiple instances of the same object type exist?
Yes
What object is used to measure disk performance?
Physical Disk Object
What is a useful counter for the Physical Disk Object?
Average Queue Length
If there are two disks, what instances can you view?
Disk 0, disk 1, and disks Total
What fields below the Performance Monitor graph list summary data?
Last, average, minimum, maximum, and duration
What details does the counter table include?
Color, Scale, Counter, Instance, Parent, Object, and Computer
What does Processor % Processor Time measure?
Non-idle thread execution time
What does sustained Processor % Processor Time over 85% indicate?
A bottleneck
What can a significantly higher % Privileged Time suggest when processor time is high?
The CPU may be underpowered
What does Physical Disk % Disk Time indicate?
The percentage of time the selected disk drive is occupied with read or write requests
What can sustained Physical Disk % Disk Time above 85% indicate?
A disk problem
What does Average Disk Queue Length show?
Outstanding disk requests
What do high Average Disk Queue Length values alongside high % Disk Time suggest?
Disk problems
What should Memory Available Bytes not be below?
10% of the total RAM
What might a continuous decline in Available Bytes indicate?
A memory leak
What does Memory Pages/sec indicate?
The number of pages read from or written to disk to resolve hard page faults and the system's use of the paging file
When does Pages/sec become excessive?
When averaging above 50
What does Paging File % Usage indicate?
The percentage of the pagefile in use
If a 1000 MB paging file averages 50% usage, what could be beneficial?
Adding around 500 MB of memory
Why can excessive paging degrade disk performance?
Paging is disk-intensive
How should counters be analyzed?
Together and in context
Why is it important to consider counters in context?
Low memory can slow the disk due to excessive paging and counters are interrelated
What is Performance Monitor designed to collect according to the reference?
Metrics over an extended period of time
What can Performance Monitor track and store over time according to the reference?
Long-term information on many different system resources, including CPU, memory, and network performance