7/29/2019 2275b_03

1/26

Module 3: Monitoring

Server Performance

7/29/2019 2275b_03

2/26

Overview

Multimedia: The Primary Server SubsystemsMonitoring Server Memory

Monitoring Processor Usage

Monitoring Disks

Monitoring Network Usage

7/29/2019 2275b_03

3/26

Multimedia: The Primary Server Subsystems

Server environments described in thispresentation: file and print servers,application servers, and domain servers

Server subsystems: memory, processor,

disk, and networkImportant point to watch for:

Which subsystem has the greatest effect

on each server environment?

http://localhost/var/www/apps/conversion/tmp/scratch_1/Multimedia/2275_3_A_ServerSubSys.html

7/29/2019 2275b_03

4/26

Lesson: Monitoring Server Memory

Why Monitor Server Memory?How to Identify and Resolve Memory Bottlenecks

How to Monitor Memory

7/29/2019 2275b_03

5/26

Why Monitor Server Memory?

Monitor server memory to determine whether any of

the following conditions exist:

Memory bottlenecksInsufficient memory

Excessive paging

Memory leaks

7/29/2019 2275b_03

6/26

How to Identify and Resolve Memory Bottlenecks

Memorycounter Acceptableaverage range Desiredvalue Action

Pages/sec 020 LowFind the process that iscausing paging

Add RAM

Available Bytes Minimum of 5% oftotal memory

HighFind the process that isusing RAM

Add RAM

Committed

Bytes

Less than physicalRAM

LowFind the process that isusing RAM

Add RAM

Pool NonpagedBytes

Remain steady,no increase Not applicable Check for memory leakin application

Page

Faults/secBelow 5 Low

Find the process that iscausing paging

Add RAM

7/29/2019 2275b_03

7/26

How to Monitor Memory

Your instructor will demonstrate how to:

Monitor memory by using Performance

Monitor memory by using Task Manager

7/29/2019 2275b_03

8/26

Practice: Monitoring Server Memory

In this practice, you will configure SystemMonitor to monitor selected memorycounters

7/29/2019 2275b_03

9/26

Lesson: Monitoring Processor Usage

What Is Processor Usage?How to Identify and Resolve Processor Bottlenecks

How to Monitor Processor Usage

7/29/2019 2275b_03

10/26

What Is Processor Usage?

Percentage of time that the processor is working

Monitor to detect processor bottlenecks

Tool Counter DisplayTask Manager CPU Usage Graph

Performance %Processor TimePercentage of elapsedtime to run non-idle thread

7/29/2019 2275b_03

11/26

How to Identify and Resolve Processor Bottlenecks

Processorcounter

Acceptableaverage range

Desired value Action

% Processor Time Less than 85% Low

Find process using excessiveprocessor timeUpgrade or add anotherprocessor

System:

Processor Queue

Length

Less than 10 LowUpgrade or add additionalprocessor

Server Work

Queues:Queue Length Less than four Low

Find process using excessiveprocessor time

Upgrade or add anotherprocessor

Interrupts/secDepends onprocessor

LowFind controller cardgenerating interrupts

7/29/2019 2275b_03

12/26

How to Monitor Processor Usage

Your instructor will demonstrate how to:

Monitor processor usage by using Performance

Monitor processor usage by using Task Manager

7/29/2019 2275b_03

13/26

Practice: Monitoring Processor Usage

In this practice, you will configure SystemMonitor to monitor selected processorcounters

7/29/2019 2275b_03

14/26

Lesson: Monitoring Disks

Why Monitor Disks?How to Identify and Resolve Disk Bottlenecks

How to Monitor Disks

7/29/2019 2275b_03

15/26

Why Monitor Disks?

Monitor disks to determine:

Presence of disk bottlenecks

Need for disk defragmentation

Need for additional or faster disks

Presence of excessive paging

Disk efficiency

7/29/2019 2275b_03

16/26

How to Identify and Resolve Disk Bottlenecks

Physical diskcounter

Acceptableaverage range

Desiredhigh or low

valueAction

% Disk Time Under 50% LowMonitor to see if pagingis occurring

Upgrade disk subsystem

Current Disk

Queue Length02 Low Upgrade disk subsystem

Avg. Disk

Bytes/Transfer

Baseline or

higherHigh Upgrade disk subsystem

Disk Bytes/secBaseline orhigher

High Upgrade disk subsystem

7/29/2019 2275b_03

17/26

How to Monitor Disks

Your instructor will demonstrate how to monitor disks

7/29/2019 2275b_03

18/26

Practice: Monitoring Disks

In this practice, you will configure SystemMonitor to monitor selected disk counters

7/29/2019 2275b_03

19/26

Lesson: Monitoring Network Usage

What Is Network Usage?How to Identify and Resolve Network Bottlenecks

How to Monitor Network Usage

7/29/2019 2275b_03

20/26

What Is Network Usage?

Percentage of network bandwidth in use on the segmentbeing monitored

Monitoring network usage helps you detect networkbottlenecks

Bottlenecks in network communications directly affectthe experience of the user at the client workstation andthe entire network

Typical causes of network bottlenecks are:

Overloaded serverOverloaded network

Loss of network integrity

7/29/2019 2275b_03

21/26

How to Identify and Resolve Network Bottlenecks

Network interfacecounter

Acceptableaverage range

Desire highor low value

Action

Network Utilization

(in Task Manager)

Generally lower than30%

Low Low

Network Interface:

Bytes Sent/sec Baseline or higher HighUpgrade network adapter

or physical network

Network Interface:Bytes Total/sec

Baseline or higher High

Perform further analysis todetermine cause ofproblemUpgrade or add anotheradapter.

Server: Bytes

Received/Sec

Less than 50% of thecapacity of thebandwidth of thenetwork card

NAUpgrade network adapteror physical network

7/29/2019 2275b_03

22/26

How to Monitor Network Usage

Your instructor will demonstrate how to monitorperformance by using:

Performance

Task Manager

7/29/2019 2275b_03

23/26

Practice: Monitoring Network Usage

In this practice, you will configure SystemMonitor to monitor selected networkcounters

7/29/2019 2275b_03

24/26

Guidelines for Using Counters and Thresholds

Subsystem Counter Threshold

Monitor page faults

Monitor available RAM

Monitor committed bytes

Over 5 per second

Less than 5% of total

More than physical RAM

% Processor time, % Privileged Time,

% User TimeSystem: Processor Queue Length

Server Work Queues: Queue Length

Above 85%

Above 2

Above 2

% Disk Time

Current Disk Queue Length

If more than 50%, check forexcessive paging

Greater than 2

Server: Bytes Total/sec, NetworkInterface: Bytes Total/sec

Higher than the baselinenumber

Best Practices for Monitoring Server

7/29/2019 2275b_03

25/26

Best Practices for Monitoring ServerPerformance

Set up Performance Logs and Alert

Keep monitoring overhead low

Analyze performance results and establish aperformance baseline

Set alerts

Perform system tuning

Monitor trends for capacity planning and add orupgrade components

7/29/2019 2275b_03

26/26

Lab A: Monitoring Server Performance

In this lab, you will configure SystemMonitor to view selected processor,memory, network, and disk counters