Adaptec 2940U - AHA Storage Controller Ultra SCSI 20 MBps Technické informace stáhnout pdf (Strana 149)

Chapter 6 Maintaining MetaFrame 135

Each object type can have several instances. For example, the Processor object

type will have multiple instances if a system has multiple processors. The

PhysicalDisk object type has two instances if a system has two disks. Some object

types, such as Memory and Server, do not have instances. If an object type has

multiple instances, each instance produces the same set of statistics (counter

information).

Solving Performance Problems

The following sections describe potential bottlenecks that can affect system

performance and discuss how to use Performance Monitor to determine if any of

these areas are adversely affecting system performance.

Processor(s)

The processor-related factors that can affect performance on a MetaFrame server

include:

Processor utilization

Interrupts

Context switches

Screen savers

Processor Utilization

If processor utilization is over 90% on a regular basis, consider upgrading the

processors in the MetaFrame server. Install a faster processor if this is a single-

processor system, or install additional processors or faster processors in a

multiprocessor system. Many server-class systems are designed to allow the

inclusion of additional processors or processor boards. MetaFrame scales linearly

as processors are added, subject to performance constraints from other system

resources such as memory. To determine CPU utilization, monitor the %Processor

Time counter under the Processor object. The %Processor Time shows the

percentage of elapsed time that a processor is busy executing non-idle threads. If

the %Processor Time counter consistently registers at or near 100%, the

processors might be slowing down the system response time. If 100% processor

utilization is consistent, check the processor queue length for excessiveness.

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Adaptec 2940U - AHA Storage Controller Ultra SCSI 20 MBps Technické informace Strana 149