Expert Oracle Exadata - Parent Directory

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CHAPTER 12 MONITORING EXADATA PERFORMANCE| `-mpstat,12626 5 720|-oswsub.sh,28848 ./oswsub.sh HighFreq ./Exadata_netstat.sh| `-Exadata_netstat,28854 ./Exadata_netstat.sh HighFreq| `-sleep,25717 15|-oswsub.sh,28849 ./oswsub.sh HighFreq ./Exadata_iostat.sh| `-Exadata_iostat.,28856 ./Exadata_iostat.sh HighFreq| |-bzip2,12105 --stdout| `-iostat,12104 -t -x 5 720|-oswsub.sh,28853 ./oswsub.sh HighFreq ./Exadata_top.sh| `-Exadata_top.sh,28864 ./Exadata_top.sh HighFreq| |-bzip2,13453 --stdout| `-top,13452 -b -c -d 5 -n 720`-oswsub.sh,28877 ./oswsub.sh HighFreq /opt/oracle.oswatcher/osw/ExadataRdsInfo.sh`-ExadataRdsInfo.,28910 /opt/oracle.oswatcher/osw/ExadataRdsInfo.sh HighFreq`-sleep,25710 10The OS Watcher daemons store their collected data in the /opt/oracle.oswatcher/osw/archive/directory. It doesn’t use any special format for storing the data; it just stores the text output of thestandard OS tools it runs. This makes it easy to use regular text processing utilities, like grep, AWK orPerl/python scripts to extract and present the information you need. Here’s an example:# ls -l /opt/oracle.oswatcher/osw/archive/total 280drwxr-s--- 2 root cellusers 28672 May 25 14:00 ExadataDiagCollectdrwxr-s--- 2 root cellusers 20480 May 25 14:00 ExadataOSWdrwxr-s--- 2 root cellusers 20480 May 25 14:00 ExadataRDSdrwxr-s--- 2 root cellusers 45056 May 25 14:00 oswcellsrvstatdrwxr-s--- 2 root cellusers 20480 May 25 14:01 oswiostatdrwxr-s--- 2 root cellusers 20480 May 25 14:00 oswmeminfodrwxr-s--- 2 root cellusers 20480 May 25 14:00 oswmpstatdrwxr-s--- 2 root cellusers 24576 May 25 14:00 oswnetstatdrwxr-s--- 2 root cellusers 4096 May 6 12:35 oswprvtnetdrwxr-s--- 2 root cellusers 20480 May 25 14:00 oswpsdrwxr-s--- 2 root cellusers 20480 May 25 14:00 oswslabinfodrwxr-s--- 2 root cellusers 20480 May 25 14:00 oswtopdrwxr-s--- 2 root cellusers 20480 May 25 14:01 oswvmstatEach directory contains archive files with corresponding command output:# cd /opt/oracle.oswatcher/osw/archive/oswiostat/# ls -tr | tailenkcel03.enkitec.com_iostat_11.05.25.0500.dat.bz2enkcel03.enkitec.com_iostat_11.05.25.0600.dat.bz2enkcel03.enkitec.com_iostat_11.05.25.0700.dat.bz2enkcel03.enkitec.com_iostat_11.05.25.0800.dat.bz2enkcel03.enkitec.com_iostat_11.05.25.0900.dat.bz2enkcel03.enkitec.com_iostat_11.05.25.1000.dat.bz2enkcel03.enkitec.com_iostat_11.05.25.1100.dat.bz2enkcel03.enkitec.com_iostat_11.05.25.1200.dat.bz2enkcel03.enkitec.com_iostat_11.05.25.1400.dat.bz2enkcel03.enkitec.com_iostat_11.05.25.1300.dat.bz2412
CHAPTER 12 MONITORING EXADATA PERFORMANCEThere is a separate bzipped file saved for each hour, making it easy to manually investigate pastperformance data or write a quick AWK, grep or Perl script, which extracts only the data of interest. Theexample below extracts iostat I/O statistics from a bzipped file from 9AM on May 25, 2011:# bzcat enkcel03.enkitec.com_iostat_11.05.25.0900.dat.bz2 | head -15zzz ***Wed May 25 09:01:43 CDT 2011 Sample interval: 5 seccondsLinux 2.6.18-194.3.1.0.4.el5 (enkcel03.enkitec.com) 05/25/11Time: 09:01:43avg-cpu: %user %nice %system %iowait %steal %idle0.76 0.00 0.78 1.37 0.00 97.09Device: r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %utilsda 12.30 12.66 17968.35 3004.31 840.31 1.27 51.05 3.68 9.18sda1 0.00 0.00 0.45 0.00 114.13 0.00 12.17 1.57 0.00sda2 0.00 0.00 0.00 0.00 2.20 0.00 0.62 0.60 0.00sda3 11.44 7.14 17879.86 2869.85 1116.56 1.21 65.19 4.76 8.84sda4 0.00 0.00 0.00 0.00 1.14 0.00 18.41 18.41 0.00sda5 0.25 4.55 14.33 116.28 27.20 0.04 8.01 2.33 1.12sda6 0.29 0.00 38.61 0.00 131.20 0.01 27.53 0.99 0.03...The OS Watcher output samples are prefixed by a timestamp line, which starts with “zzz” as you seeabove. This shows you the exact time, up to the second, when the OS command was executed and whatthe sample interval was. Note that this “zzz” line will only show you when the monitoring command wasexecuted. Some commands are executed only once per hour, but they keep collecting and dumping datasamples throughout that hour. In such case there are monitoring command-specific timestamps printedfor each data sample. The following example shows how the cellsrvstat command uses ===CurrentTime=== to indicate the exact time the performance data below it is from. You can use this prefix in yourcustom scripts. Here’s an example:::# bzcat enkcel03.enkitec.com_cellsrvstat_11.05.25.1300.dat.bz2 | head -30zzz ***Wed May 25 13:00:00 CDT 2011 Sample interval: 5 secconds===Current Time=== Wed May 25 13:00:00 2011== Input/Output related stats ==Number of hard disk block IO read requests 0 167987444Number of hard disk block IO write requests 0 150496829Hard disk block IO reads (KB) 0 111186344274Hard disk block IO writes (KB) 0 25224016152Number of flash disk block IO read requests 0 67230332Number of flash disk block IO write requests 0 15528794Flash disk block IO reads (KB) 0 870806808Flash disk block IO writes (KB) 0 347337424Number of disk IO errors 0 0Number of reads from flash cache 0 57890992Number of writes to flash cache 0 13119701Flash cache reads (KB) 0 870014160Flash cache writes (KB) 0 347236056Number of flash cache IO errors 0 0Size of eviction from flash cache (KB) 0 0Number of outstanding large flash IOs 0 0Number of latency threshold warnings during job 0 13400413
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IntroductionThank you for purchasin
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INTRODUCTIONwere implementing Exada
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CHAPTER 1 WHAT IS EXADATA?end of t
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CHAPTER 1 WHAT IS EXADATA?Limited
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CHAPTER 1 WHAT IS EXADATA?Software
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C H A P T E R 2Offloading / Smart S
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CHAPTER 2 OFFLOADING / SMART SCANR
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CHAPTER 2 OFFLOADING / SMART SCANS
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C H A P T E R 3Hybrid Columnar Comp
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CHAPTER 3 HYBRID COLUMNAR COMPRESS
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C H A P T E R 4Storage IndexesStora
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CHAPTER 4 STORAGE INDEXESMonitorin
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CHAPTER 4 STORAGE INDEXESSYS@EXDB1
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CHAPTER 4 STORAGE INDEXESpositives
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CHAPTER 4 STORAGE INDEXESIncorrect
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CHAPTER 4 STORAGE INDEXES---------
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CHAPTER 4 STORAGE INDEXES1 row sel
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C H A P T E R 5Exadata Smart Flash
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CHAPTER 5 EXADATA SMART FLASH CACH
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C H A P T E R 6Exadata Parallel Ope
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CHAPTER 6 MAKING PCBSParameter Def
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CHAPTER 6 MAKING PCBSTable 6-2. Hi
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CHAPTER 6 MAKING PCBSSo as you can
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CHAPTER 6 MAKING PCBS-- switch to
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CHAPTER 6 MAKING PCBS((4 × CPU_co
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CHAPTER 6 MAKING PCBSSYS@EXDB1> /S
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CHAPTER 6 MAKING PCBSSYS@EXDB1> @q
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CHAPTER 6 MAKING PCBSControlDescri
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CHAPTER 6 MAKING PCBSEnter value f
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CHAPTER 6 MAKING PCBSphysical read
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CHAPTER 7 RESOURCE MANAGEMENTimpor
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CHAPTER 7 RESOURCE MANAGEMENTSQL>
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C H A P T E R 8Configuring ExadataO
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CHAPTER 8 CONFIGURING EXADATAThe P
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CHAPTER 8 CONFIGURING EXADATATable
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CHAPTER 8 CONFIGURING EXADATA Note
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CHAPTER 9 RECOVERING EXADATAprovid
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CHAPTER 9 RECOVERING EXADATASystem
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CHAPTER 9 RECOVERING EXADATA-rw-r-
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CHAPTER 9 RECOVERING EXADATASYS:+A
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CHAPTER 9 RECOVERING EXADATA■ No
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CHAPTER 9 RECOVERING EXADATACellCL
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CHAPTER 10 EXADATA WAIT EVENTSSYS@
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CHAPTER 10 EXADATA WAIT EVENTScell
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CHAPTER 10 EXADATA WAIT EVENTScolu
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CHAPTER 10 EXADATA WAIT EVENTSYou
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C H A P T E R 11Understanding Exada
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CHAPTER 11 UNDERSTANDING EXADATA P
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C H A P T E R 14Storage LayoutIn Or
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CHAPTER 14 STORAGE LAYOUTFailure G
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CHAPTER 14 STORAGE LAYOUTGrid Disk
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CHAPTER 14 STORAGE LAYOUTASM Disk
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CHAPTER 14 STORAGE LAYOUTTable 14-
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CHAPTER 15 COMPUTE NODE LAYOUTCPU
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C H A P T E R 16Unlearning Some Thi
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CHAPTER 16 UNLEARNING SOME THINGS
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A P P E N D I X ACellCLI and dcliCe
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APPENDIX A CELLCLI AND DCLILIST FL
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A P P E N D I X BOnline Exadata Res
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A P P E N D I X CDiagnostic Scripts
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APPENDIX C DIAGNOSTIC SCRIPTSScrip
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Index• AAccess control list (ACL)
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• INDEXnetwork componentsclient a
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• INDEX• Epredicate offload, 36
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• INDEXOTHER_GROUPS consumer grou
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• INDEXCPU utilization, 152mixed
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• INDEXstructure, 105sub-query, 1
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Expert Oracle Exadatan n nKerry Osb
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Contents• About the Authors......
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• CONTENTSHow to Verify That Smar
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• CONTENTSControlling ESFC Usage
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• CONTENTSSummary ...............
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• CONTENTS• Chapter 12: Monitor
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• CONTENTS• Chapter 16: Unlearn
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About the Technical Reviewer Kevin
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