AIX 5L Problem Determination - IBM Redbooks

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6. Which command will show system calls and fork rates? A. sar -c B. vmtune C. vmstat D. svmon 7. A system appears to be experiencing network performance problems on the Ethernet adapter. A network engineer reports seeing an abnormally large number of collisions on the network. However, a netstat -i is run and shows 0 collisions. What does this statistic indicate? A. There are no collisions in the collision domain. B. There were no packet errors caused by collisions. C. The system did not generate any collisions. D. This statistic is not meaningful for detecting collisions. 8. Which of the following pieces of information is not included in the tprof report? A. Idle B. PID C. TID D. Kernel 9. Which WLM flag/option allows all classes to have access to the whole resource set of the system, regardless of whether they use a restricted resource set? A. wlmcntrl -d B. wlmcntrl -p C. wlmcntrl -g D. wlmcntrl -o 304 IBM ^ Certification Study Guide - AIX 5L Problem Determination Tools and Techniques
10.9.1 Answers The following are the preferred answers to the questions provided in this section. 1. A 2. D 3. C 4. B 5. C 6. A 7. D 8. A 9. C Chapter 10. Performance problem determination 305
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ibm.com/redbooks IBM Certification
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Note: Before using this information
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3.5.1 The /etc/inittab file . . . .
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7.2.1 Data relocation . . . . . . .
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9.9.1 The lslicense command . . . .
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x IBM ^ Certification Study Guide -
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10-12 Performance tuning flowchart
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8-7 Commonly used flags of the rout
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Trademarks The following terms are
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This publication does not replace p
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Comments welcome Your comments are
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1.1 Certification requirements To a
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e. Verify that file systems are mou
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Preparation for this exam is the to
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2.1 Defining the problem The first
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If the problem occurs on more than
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2.4.1 Answers The following are the
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3.1 A general overview of the boot
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mainly to components on the motherb
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Figure 3-3 Task selection menu in d
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3.2.2 PCI systems next step is to s
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3.3 Boot phase 1 Newer PCI architec
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3.4 Boot phase 2 In boot phase 2, t
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As mentioned, there are a lot of di
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3.4.3 LED 518 product documentation
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Figure 3-9 Boot phase 3 /etc/initta
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3.5.2 LED 553 3.5.3 LED c31 3.5.4 L
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3.5.5 pSeries servers A specific LE
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When the system is gracefully shut
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LED Reason/action c31 Define the co
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3. A file system is being mounted b
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3.9.1 Answers 3.10 Exercises The fo
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4.1 Hardware basics RS/6000 and pSe
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The most important fields in the pr
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Figure 4-1 Main diagnostics menu Th
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► Full testing requires that the
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3. Place the CD-ROM into the drive.
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Note: This service aid is only pres
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2. Select Change Show use of an SSA
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LED 299 A LED code of 299 shows tha
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Figure 4-2 Format of the 103 code m
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4.5 Quiz The following assessment q
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4.5.1 Answers 4.6 Exercises The fol
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5.1 Configuring the dump device Pri
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5.2 Starting a system dump A user-i
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A command status screen will be dis
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If the system does not have a key s
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The shconf command is invoked when
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5.4 Increasing the size of the dump
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Setting output device to /dev/rmt0.
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Look at the time of the dump and th
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Failure Causes SOFTWARE PROGRAM Rec
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Using crash, you can examine: ► A
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► ? or help[] Lists all subcomman
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LR: .waitproc+d4 (0000edc4) 2ff3b38
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DSIRR Data Storage Interrupt Reason
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*prevthread:0xe6000000 *nextthread:
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In this example, the VMM return cod
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The snap command syntax is as follo
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Flag Description -t Format Lists ea
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Flag Description -p Device Temporar
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Figure 5-3 Error log case study 2.
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Figure 5-4 Case study Which of the
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5.10.1 Answers 5.11 Exercises The f
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6.1 The error daemon The error logg
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To change the current log file, the
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To process a report from the error
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Flag Description -g Displays the AS
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Flag Description -F FlagList Select
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Probable Causes ERRDEMON STARTED AU
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To display a detailed report of all
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USER ID 0 0=SOFT IPL 1=HALT 2=TIME
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Resource Class: planar Resource Typ
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Flag Description -k ErrorID[,ErrorI
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6.5.1 Setting up an accounting syst
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6.6 The syslogd daemon The syslogd
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Use the following message priority
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3. A system operator accidentally d
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7.1 LVM data The Logical Volume Man
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7.2.1 Data relocation 7.2.2 Backup
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AIX version level Verify that the v
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This example shows that the volume
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This error information displays the
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hdisk0 Available 30-58-00-8,0 16 Bi
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7.4 The AIX JFS 7.4.1 Creating a JF
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7.4.2 Increasing the file system si
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In many cases, restoration of the b
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lv02 jfs 2 2 1 open/syncd /u/testfs
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► Understanding enhanced journale
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512 bytes) to minimize internal fra
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Function JFS2 JFS Compression No Ye
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7.4.10 Disk quota Pseudo file name
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home: blocks in use: 0, limits (sof
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7.5.3 Reducing and removing paging
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Table 7-3 Commonly used flag of the
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7.6.4 The rmlvcopy command The rmlv
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Which of the following commands sho
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8.1 Network interface problems If h
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As you can see, the output shows th
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3. If there is a default route, att
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If you are using the route command
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address of the named server and try
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TOK: access control field = 0, fram
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4. Initiate an iptrace (client, ser
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the nfs_max_threads parameter of th
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Flags Description -s host Records p
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8.6 Quiz Table 8-8 Commonly used fl
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8. Which of the following options w
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9.1 User license problems If it is
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telnet: connect: A remote host did
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9.2.4 Telnet error If when attempti
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user is limited and defined as an A
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9.4.3 A full file system uid=0(root
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9.5.1 Trace hook IDs The events tra
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your trace, the system may be traci
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113 0.004261661 0.001518 unlock: lo
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If the sendmail command encounters
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9.8 Printing Task SMIT fast path Co
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Action or function System V PowerPC
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Switching between subsystems The op
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Flag Description -s Subsystem Speci
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9.10 Quiz Flag Description -O Optio
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6. A user has the ability to ping t
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232 IBM ^ Certification Study Guide
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Figure 10-1 General performance tun
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Display previously captured data Th
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10.1.2 The vmstat command The vmsta
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later). The method used in AIX Vers
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second. Large values indicate a CPU
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kernel routine records the process
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syncd 1 2 2 0 0 0 sh 1 1 1 0 0 0 sl
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The memory columns The memory colum
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The sr column The sr column shows t
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If you want to sort to the sixth co
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Page 278 and 279: schedtune limitations The schedtune
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Page 288 and 289: those that do not. If you are runni
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Page 294 and 295: Late Collision Errors The Late Coll
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Page 298 and 299: Figure 10-3 Web-based System Manage
Page 300 and 301: Superclasses A superclass is a clas
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Page 304 and 305: The sequence of attributes within a
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Page 316 and 317: 10.6.1 The dbx command The dbx comm
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Page 322 and 323: 10.8 Command summary The following
Page 324 and 325: 10.8.4 The nfsstat command 10.9 Qui
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Page 330 and 331: 11.1 Overview 11.1.1 Terminology 11
Page 332 and 333: Note: Before installing a new set o
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Page 338 and 339: Table 11-2 Commonly used flags of t
Page 340 and 341: 11.5 Quiz Flag Description -f Check
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Page 356 and 357: I/O Input/Output I 2 C Inter Integr
Page 358 and 359: OEM Original Equipment Manufacturer
Page 360 and 361: SPM System Performance Measurement
Page 364 and 365: Other resources These publications
Page 368 and 369: phase1 figure 23 phase2 15, 24, 36
Page 370 and 371: pc.statd 189 daemons shdaemon 73 te
Page 372 and 373: host name resolution telnet login p
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ecent CPU usage 241 recovering an i
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System Resource Controller (SRC) 13
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358 IBM ^ Certification Study Guide
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IBM Certification Study Guide - AIX
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AIX 5L Problem Determination - IBM Redbooks

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