Monitoring And Optimization Essay
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PERFORMANCE MONITOR AND NETWORK MONITOR
PERFORMANCE MONITOR
Windows NT Object Counters in Performance Monitor
OBJECT PURPOSE
Cache L2 cache performance
Logical disk Mass storage performance, including network storage
Memory Memory performance and usage
Objects Process and tread counts
Paging file Virtual memory usage
Physical disk HD performance
Process Performance of executing processes
Processor Processor(s) performance
System Windows NT performance
Thread Individual thread performance
You will also see objects for each network service installed.
MONITORING FOR PROCESSOR BOTTLENECKS
MAJOR PROCESSOR RELATED COUNTERS TO WATCH:
Processor: %Processor Time - How busy the microprocessor is. Processor is a bottleneck if sustained >80%
Processor: Interrupts/sec - Rate of service requests from peripheral devices. If you have a high rate of interrupts/sec with no corresponding hardware functions then you may have a bad piece of hardware. Should be between 100 and 1000. Spikes to 2000 are ok.
System: Processor queue length - Number of threads waiting to be serviced. >2 then processor is a bottleneck. Queue length will always be zero unless you are also monitoring a thread specific counter (Context switches/sec is number of threads switched/sec by the processor and is good to use).
MONITORING THE DISK FOR BOTTLENECKS
IF THE DISK LIGHT IS ON ALL THE TIME, YOU NEED MORE RAM
More Ram will increase the size of the disk cache and decrease page swapping to disk and will increase the apparent speed of the disk.
Logical disk vs. Physical disk
Two different objects in Performance monitor.
Logical disk measures performance of stripe sets, volume sets and mapped network drives.
Physical disk measures real transfers to and from actual hard disk or RAID set. Used to compare disks and to provide specific information about a disk.
MAJOR DISK RELATED COUNTERS TO WATCH:
Memory: Pages/sec shows the number of memory pages swapped out to disk per second. Useful with %disk time: modify the size of the page file and watch the result of these two disk counters.
%Disk time does not directly measure the disk. It shows how much time the processor is spending servicing disk requests. Use with Processor: %Processor Time to determine if the disk is eating up the processor.
Disk bytes per second shows how fast your disk is. Copy a big...
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