Enviar pesquisa
Carregar
Oracle Performance Tuning Fundamentals
•
Transferir como PPSX, PDF
•
13 gostaram
•
13,239 visualizações
Carlos Sierra
Seguir
Part of the Oracle Performance 101 Workshop
Leia menos
Leia mais
Software
Denunciar
Compartilhar
Denunciar
Compartilhar
1 de 60
Baixar agora
Recomendados
Understanding SQL Trace, TKPROF and Execution Plan for beginners
Understanding SQL Trace, TKPROF and Execution Plan for beginners
Carlos Sierra
Survey of some free Tools to enhance your SQL Tuning and Performance Diagnost...
Survey of some free Tools to enhance your SQL Tuning and Performance Diagnost...
Carlos Sierra
SQL Tuning 101
SQL Tuning 101
Carlos Sierra
Exploring Oracle Database Performance Tuning Best Practices for DBAs and Deve...
Exploring Oracle Database Performance Tuning Best Practices for DBAs and Deve...
Aaron Shilo
Adapting and adopting spm v04
Adapting and adopting spm v04
Carlos Sierra
Understanding my database through SQL*Plus using the free tool eDB360
Understanding my database through SQL*Plus using the free tool eDB360
Carlos Sierra
Ash masters : advanced ash analytics on Oracle
Ash masters : advanced ash analytics on Oracle
Kyle Hailey
Oracle Database Performance Tuning Advanced Features and Best Practices for DBAs
Oracle Database Performance Tuning Advanced Features and Best Practices for DBAs
Zohar Elkayam
Recomendados
Understanding SQL Trace, TKPROF and Execution Plan for beginners
Understanding SQL Trace, TKPROF and Execution Plan for beginners
Carlos Sierra
Survey of some free Tools to enhance your SQL Tuning and Performance Diagnost...
Survey of some free Tools to enhance your SQL Tuning and Performance Diagnost...
Carlos Sierra
SQL Tuning 101
SQL Tuning 101
Carlos Sierra
Exploring Oracle Database Performance Tuning Best Practices for DBAs and Deve...
Exploring Oracle Database Performance Tuning Best Practices for DBAs and Deve...
Aaron Shilo
Adapting and adopting spm v04
Adapting and adopting spm v04
Carlos Sierra
Understanding my database through SQL*Plus using the free tool eDB360
Understanding my database through SQL*Plus using the free tool eDB360
Carlos Sierra
Ash masters : advanced ash analytics on Oracle
Ash masters : advanced ash analytics on Oracle
Kyle Hailey
Oracle Database Performance Tuning Advanced Features and Best Practices for DBAs
Oracle Database Performance Tuning Advanced Features and Best Practices for DBAs
Zohar Elkayam
Enable GoldenGate Monitoring with OEM 12c/JAgent
Enable GoldenGate Monitoring with OEM 12c/JAgent
Bobby Curtis
AWR and ASH Deep Dive
AWR and ASH Deep Dive
Kellyn Pot'Vin-Gorman
Performance Stability, Tips and Tricks and Underscores
Performance Stability, Tips and Tricks and Underscores
Jitendra Singh
TFA Collector - what can one do with it
TFA Collector - what can one do with it
Sandesh Rao
Oracle db performance tuning
Oracle db performance tuning
Simon Huang
Performance Tuning With Oracle ASH and AWR. Part 1 How And What
Performance Tuning With Oracle ASH and AWR. Part 1 How And What
udaymoogala
Oracle Performance Tools of the Trade
Oracle Performance Tools of the Trade
Carlos Sierra
Oracle Performance Tuning Fundamentals
Oracle Performance Tuning Fundamentals
Enkitec
How a Developer can Troubleshoot a SQL performing poorly on a Production DB
How a Developer can Troubleshoot a SQL performing poorly on a Production DB
Carlos Sierra
Your tuning arsenal: AWR, ADDM, ASH, Metrics and Advisors
Your tuning arsenal: AWR, ADDM, ASH, Metrics and Advisors
John Kanagaraj
Tanel Poder - Performance stories from Exadata Migrations
Tanel Poder - Performance stories from Exadata Migrations
Tanel Poder
Oracle sql high performance tuning
Oracle sql high performance tuning
Guy Harrison
Oracle Database performance tuning using oratop
Oracle Database performance tuning using oratop
Sandesh Rao
DB Time, Average Active Sessions, and ASH Math - Oracle performance fundamentals
DB Time, Average Active Sessions, and ASH Math - Oracle performance fundamentals
John Beresniewicz
SQLd360
SQLd360
Mauro Pagano
PostgreSQL Deep Internal
PostgreSQL Deep Internal
EXEM
Troubleshooting Complex Performance issues - Oracle SEG$ contention
Troubleshooting Complex Performance issues - Oracle SEG$ contention
Tanel Poder
SQL Monitoring in Oracle Database 12c
SQL Monitoring in Oracle Database 12c
Tanel Poder
Analyzing and Interpreting AWR
Analyzing and Interpreting AWR
pasalapudi
Low Level CPU Performance Profiling Examples
Low Level CPU Performance Profiling Examples
Tanel Poder
How should I monitor my idaa
How should I monitor my idaa
Cuneyt Goksu
SQL Explore 2012: P&T Part 1
SQL Explore 2012: P&T Part 1
sqlserver.co.il
Mais conteúdo relacionado
Mais procurados
Enable GoldenGate Monitoring with OEM 12c/JAgent
Enable GoldenGate Monitoring with OEM 12c/JAgent
Bobby Curtis
AWR and ASH Deep Dive
AWR and ASH Deep Dive
Kellyn Pot'Vin-Gorman
Performance Stability, Tips and Tricks and Underscores
Performance Stability, Tips and Tricks and Underscores
Jitendra Singh
TFA Collector - what can one do with it
TFA Collector - what can one do with it
Sandesh Rao
Oracle db performance tuning
Oracle db performance tuning
Simon Huang
Performance Tuning With Oracle ASH and AWR. Part 1 How And What
Performance Tuning With Oracle ASH and AWR. Part 1 How And What
udaymoogala
Oracle Performance Tools of the Trade
Oracle Performance Tools of the Trade
Carlos Sierra
Oracle Performance Tuning Fundamentals
Oracle Performance Tuning Fundamentals
Enkitec
How a Developer can Troubleshoot a SQL performing poorly on a Production DB
How a Developer can Troubleshoot a SQL performing poorly on a Production DB
Carlos Sierra
Your tuning arsenal: AWR, ADDM, ASH, Metrics and Advisors
Your tuning arsenal: AWR, ADDM, ASH, Metrics and Advisors
John Kanagaraj
Tanel Poder - Performance stories from Exadata Migrations
Tanel Poder - Performance stories from Exadata Migrations
Tanel Poder
Oracle sql high performance tuning
Oracle sql high performance tuning
Guy Harrison
Oracle Database performance tuning using oratop
Oracle Database performance tuning using oratop
Sandesh Rao
DB Time, Average Active Sessions, and ASH Math - Oracle performance fundamentals
DB Time, Average Active Sessions, and ASH Math - Oracle performance fundamentals
John Beresniewicz
SQLd360
SQLd360
Mauro Pagano
PostgreSQL Deep Internal
PostgreSQL Deep Internal
EXEM
Troubleshooting Complex Performance issues - Oracle SEG$ contention
Troubleshooting Complex Performance issues - Oracle SEG$ contention
Tanel Poder
SQL Monitoring in Oracle Database 12c
SQL Monitoring in Oracle Database 12c
Tanel Poder
Analyzing and Interpreting AWR
Analyzing and Interpreting AWR
pasalapudi
Low Level CPU Performance Profiling Examples
Low Level CPU Performance Profiling Examples
Tanel Poder
Mais procurados
(20)
Enable GoldenGate Monitoring with OEM 12c/JAgent
Enable GoldenGate Monitoring with OEM 12c/JAgent
AWR and ASH Deep Dive
AWR and ASH Deep Dive
Performance Stability, Tips and Tricks and Underscores
Performance Stability, Tips and Tricks and Underscores
TFA Collector - what can one do with it
TFA Collector - what can one do with it
Oracle db performance tuning
Oracle db performance tuning
Performance Tuning With Oracle ASH and AWR. Part 1 How And What
Performance Tuning With Oracle ASH and AWR. Part 1 How And What
Oracle Performance Tools of the Trade
Oracle Performance Tools of the Trade
Oracle Performance Tuning Fundamentals
Oracle Performance Tuning Fundamentals
How a Developer can Troubleshoot a SQL performing poorly on a Production DB
How a Developer can Troubleshoot a SQL performing poorly on a Production DB
Your tuning arsenal: AWR, ADDM, ASH, Metrics and Advisors
Your tuning arsenal: AWR, ADDM, ASH, Metrics and Advisors
Tanel Poder - Performance stories from Exadata Migrations
Tanel Poder - Performance stories from Exadata Migrations
Oracle sql high performance tuning
Oracle sql high performance tuning
Oracle Database performance tuning using oratop
Oracle Database performance tuning using oratop
DB Time, Average Active Sessions, and ASH Math - Oracle performance fundamentals
DB Time, Average Active Sessions, and ASH Math - Oracle performance fundamentals
SQLd360
SQLd360
PostgreSQL Deep Internal
PostgreSQL Deep Internal
Troubleshooting Complex Performance issues - Oracle SEG$ contention
Troubleshooting Complex Performance issues - Oracle SEG$ contention
SQL Monitoring in Oracle Database 12c
SQL Monitoring in Oracle Database 12c
Analyzing and Interpreting AWR
Analyzing and Interpreting AWR
Low Level CPU Performance Profiling Examples
Low Level CPU Performance Profiling Examples
Semelhante a Oracle Performance Tuning Fundamentals
How should I monitor my idaa
How should I monitor my idaa
Cuneyt Goksu
SQL Explore 2012: P&T Part 1
SQL Explore 2012: P&T Part 1
sqlserver.co.il
Oracle GoldenGate Architecture Performance
Oracle GoldenGate Architecture Performance
Enkitec
OGG Architecture Performance
OGG Architecture Performance
Enkitec
Oracle GoldenGate Presentation from OTN Virtual Technology Summit - 7/9/14 (PDF)
Oracle GoldenGate Presentation from OTN Virtual Technology Summit - 7/9/14 (PDF)
Bobby Curtis
Performance Scenario: Diagnosing and resolving sudden slow down on two node RAC
Performance Scenario: Diagnosing and resolving sudden slow down on two node RAC
Kristofferson A
Apouc 2014-enterprise-manager-12c
Apouc 2014-enterprise-manager-12c
OUGTH Oracle User Group in Thailand
Collaborate 2019 - How to Understand an AWR Report
Collaborate 2019 - How to Understand an AWR Report
Alfredo Krieg
Apache Kudu: Technical Deep Dive
Apache Kudu: Technical Deep Dive
Cloudera, Inc.
Investigate SQL Server Memory Like Sherlock Holmes
Investigate SQL Server Memory Like Sherlock Holmes
Richard Douglas
Collaborate 2011-tuning-ebusiness-416502
Collaborate 2011-tuning-ebusiness-416502
kaziul Islam Bulbul
Performance Analysis: new tools and concepts from the cloud
Performance Analysis: new tools and concepts from the cloud
Brendan Gregg
Configuring Sage 500 for Performance
Configuring Sage 500 for Performance
RKLeSolutions
Extreme Replication - RMOUG Presentation
Extreme Replication - RMOUG Presentation
Bobby Curtis
KoprowskiT - SQLBITS X - 2am a disaster just began
KoprowskiT - SQLBITS X - 2am a disaster just began
Tobias Koprowski
Sergey Dzyuban "To Build My Own Cloud with Blackjack…"
Sergey Dzyuban "To Build My Own Cloud with Blackjack…"
Fwdays
SharePoint 2013 Performance Analysis - Robi Vončina
SharePoint 2013 Performance Analysis - Robi Vončina
SPC Adriatics
(ATS4-PLAT08) Server Pool Management
(ATS4-PLAT08) Server Pool Management
BIOVIA
Oracle Database Performance Tuning Concept
Oracle Database Performance Tuning Concept
Chien Chung Shen
Analyze database system using a 3 d method
Analyze database system using a 3 d method
Ajith Narayanan
Semelhante a Oracle Performance Tuning Fundamentals
(20)
How should I monitor my idaa
How should I monitor my idaa
SQL Explore 2012: P&T Part 1
SQL Explore 2012: P&T Part 1
Oracle GoldenGate Architecture Performance
Oracle GoldenGate Architecture Performance
OGG Architecture Performance
OGG Architecture Performance
Oracle GoldenGate Presentation from OTN Virtual Technology Summit - 7/9/14 (PDF)
Oracle GoldenGate Presentation from OTN Virtual Technology Summit - 7/9/14 (PDF)
Performance Scenario: Diagnosing and resolving sudden slow down on two node RAC
Performance Scenario: Diagnosing and resolving sudden slow down on two node RAC
Apouc 2014-enterprise-manager-12c
Apouc 2014-enterprise-manager-12c
Collaborate 2019 - How to Understand an AWR Report
Collaborate 2019 - How to Understand an AWR Report
Apache Kudu: Technical Deep Dive
Apache Kudu: Technical Deep Dive
Investigate SQL Server Memory Like Sherlock Holmes
Investigate SQL Server Memory Like Sherlock Holmes
Collaborate 2011-tuning-ebusiness-416502
Collaborate 2011-tuning-ebusiness-416502
Performance Analysis: new tools and concepts from the cloud
Performance Analysis: new tools and concepts from the cloud
Configuring Sage 500 for Performance
Configuring Sage 500 for Performance
Extreme Replication - RMOUG Presentation
Extreme Replication - RMOUG Presentation
KoprowskiT - SQLBITS X - 2am a disaster just began
KoprowskiT - SQLBITS X - 2am a disaster just began
Sergey Dzyuban "To Build My Own Cloud with Blackjack…"
Sergey Dzyuban "To Build My Own Cloud with Blackjack…"
SharePoint 2013 Performance Analysis - Robi Vončina
SharePoint 2013 Performance Analysis - Robi Vončina
(ATS4-PLAT08) Server Pool Management
(ATS4-PLAT08) Server Pool Management
Oracle Database Performance Tuning Concept
Oracle Database Performance Tuning Concept
Analyze database system using a 3 d method
Analyze database system using a 3 d method
Mais de Carlos Sierra
Online index rebuild automation
Online index rebuild automation
Carlos Sierra
Introducing the eDB360 Tool
Introducing the eDB360 Tool
Carlos Sierra
Introducing the eDB360 Tool
Introducing the eDB360 Tool
Carlos Sierra
Understanding How is that Adaptive Cursor Sharing (ACS) produces multiple Opt...
Understanding How is that Adaptive Cursor Sharing (ACS) produces multiple Opt...
Carlos Sierra
Using SQL Plan Management (SPM) to balance Plan Flexibility and Plan Stability
Using SQL Plan Management (SPM) to balance Plan Flexibility and Plan Stability
Carlos Sierra
SQL Tuning made easier with SQLTXPLAIN (SQLT)
SQL Tuning made easier with SQLTXPLAIN (SQLT)
Carlos Sierra
SQLT XPLORE: The SQLT XPLAIN hidden child
SQLT XPLORE: The SQLT XPLAIN hidden child
Carlos Sierra
Mais de Carlos Sierra
(7)
Online index rebuild automation
Online index rebuild automation
Introducing the eDB360 Tool
Introducing the eDB360 Tool
Introducing the eDB360 Tool
Introducing the eDB360 Tool
Understanding How is that Adaptive Cursor Sharing (ACS) produces multiple Opt...
Understanding How is that Adaptive Cursor Sharing (ACS) produces multiple Opt...
Using SQL Plan Management (SPM) to balance Plan Flexibility and Plan Stability
Using SQL Plan Management (SPM) to balance Plan Flexibility and Plan Stability
SQL Tuning made easier with SQLTXPLAIN (SQLT)
SQL Tuning made easier with SQLTXPLAIN (SQLT)
SQLT XPLORE: The SQLT XPLAIN hidden child
SQLT XPLORE: The SQLT XPLAIN hidden child
Último
Exploring the Best Video Editing App.pdf
Exploring the Best Video Editing App.pdf
proinshot.com
%+27788225528 love spells in Colorado Springs Psychic Readings, Attraction sp...
%+27788225528 love spells in Colorado Springs Psychic Readings, Attraction sp...
masabamasaba
10 Trends Likely to Shape Enterprise Technology in 2024
10 Trends Likely to Shape Enterprise Technology in 2024
Mind IT Systems
OpenChain - The Ramifications of ISO/IEC 5230 and ISO/IEC 18974 for Legal Pro...
OpenChain - The Ramifications of ISO/IEC 5230 and ISO/IEC 18974 for Legal Pro...
Shane Coughlan
Direct Style Effect Systems -The Print[A] Example- A Comprehension Aid
Direct Style Effect Systems -The Print[A] Example- A Comprehension Aid
Philip Schwarz
Right Money Management App For Your Financial Goals
Right Money Management App For Your Financial Goals
Jhone kinadey
%in Lydenburg+277-882-255-28 abortion pills for sale in Lydenburg
%in Lydenburg+277-882-255-28 abortion pills for sale in Lydenburg
masabamasaba
%+27788225528 love spells in Atlanta Psychic Readings, Attraction spells,Brin...
%+27788225528 love spells in Atlanta Psychic Readings, Attraction spells,Brin...
masabamasaba
%in Midrand+277-882-255-28 abortion pills for sale in midrand
%in Midrand+277-882-255-28 abortion pills for sale in midrand
masabamasaba
W01_panagenda_Navigating-the-Future-with-The-Hitchhikers-Guide-to-Notes-and-D...
W01_panagenda_Navigating-the-Future-with-The-Hitchhikers-Guide-to-Notes-and-D...
panagenda
+971565801893>>SAFE AND ORIGINAL ABORTION PILLS FOR SALE IN DUBAI AND ABUDHAB...
+971565801893>>SAFE AND ORIGINAL ABORTION PILLS FOR SALE IN DUBAI AND ABUDHAB...
Health
TECUNIQUE: Success Stories: IT Service provider
TECUNIQUE: Success Stories: IT Service provider
mohitmore19
Introducing Microsoft’s new Enterprise Work Management (EWM) Solution
Introducing Microsoft’s new Enterprise Work Management (EWM) Solution
OnePlan Solutions
%+27788225528 love spells in new york Psychic Readings, Attraction spells,Bri...
%+27788225528 love spells in new york Psychic Readings, Attraction spells,Bri...
masabamasaba
VTU technical seminar 8Th Sem on Scikit-learn
VTU technical seminar 8Th Sem on Scikit-learn
AmarnathKambale
%in tembisa+277-882-255-28 abortion pills for sale in tembisa
%in tembisa+277-882-255-28 abortion pills for sale in tembisa
masabamasaba
CHEAP Call Girls in Pushp Vihar (-DELHI )🔝 9953056974🔝(=)/CALL GIRLS SERVICE
CHEAP Call Girls in Pushp Vihar (-DELHI )🔝 9953056974🔝(=)/CALL GIRLS SERVICE
9953056974 Low Rate Call Girls In Saket, Delhi NCR
Crypto Cloud Review - How To Earn Up To $500 Per DAY Of Bitcoin 100% On AutoP...
Crypto Cloud Review - How To Earn Up To $500 Per DAY Of Bitcoin 100% On AutoP...
SelfMade bd
Payment Gateway Testing Simplified_ A Step-by-Step Guide for Beginners.pdf
Payment Gateway Testing Simplified_ A Step-by-Step Guide for Beginners.pdf
kalichargn70th171
%in Durban+277-882-255-28 abortion pills for sale in Durban
%in Durban+277-882-255-28 abortion pills for sale in Durban
masabamasaba
Último
(20)
Exploring the Best Video Editing App.pdf
Exploring the Best Video Editing App.pdf
%+27788225528 love spells in Colorado Springs Psychic Readings, Attraction sp...
%+27788225528 love spells in Colorado Springs Psychic Readings, Attraction sp...
10 Trends Likely to Shape Enterprise Technology in 2024
10 Trends Likely to Shape Enterprise Technology in 2024
OpenChain - The Ramifications of ISO/IEC 5230 and ISO/IEC 18974 for Legal Pro...
OpenChain - The Ramifications of ISO/IEC 5230 and ISO/IEC 18974 for Legal Pro...
Direct Style Effect Systems -The Print[A] Example- A Comprehension Aid
Direct Style Effect Systems -The Print[A] Example- A Comprehension Aid
Right Money Management App For Your Financial Goals
Right Money Management App For Your Financial Goals
%in Lydenburg+277-882-255-28 abortion pills for sale in Lydenburg
%in Lydenburg+277-882-255-28 abortion pills for sale in Lydenburg
%+27788225528 love spells in Atlanta Psychic Readings, Attraction spells,Brin...
%+27788225528 love spells in Atlanta Psychic Readings, Attraction spells,Brin...
%in Midrand+277-882-255-28 abortion pills for sale in midrand
%in Midrand+277-882-255-28 abortion pills for sale in midrand
W01_panagenda_Navigating-the-Future-with-The-Hitchhikers-Guide-to-Notes-and-D...
W01_panagenda_Navigating-the-Future-with-The-Hitchhikers-Guide-to-Notes-and-D...
+971565801893>>SAFE AND ORIGINAL ABORTION PILLS FOR SALE IN DUBAI AND ABUDHAB...
+971565801893>>SAFE AND ORIGINAL ABORTION PILLS FOR SALE IN DUBAI AND ABUDHAB...
TECUNIQUE: Success Stories: IT Service provider
TECUNIQUE: Success Stories: IT Service provider
Introducing Microsoft’s new Enterprise Work Management (EWM) Solution
Introducing Microsoft’s new Enterprise Work Management (EWM) Solution
%+27788225528 love spells in new york Psychic Readings, Attraction spells,Bri...
%+27788225528 love spells in new york Psychic Readings, Attraction spells,Bri...
VTU technical seminar 8Th Sem on Scikit-learn
VTU technical seminar 8Th Sem on Scikit-learn
%in tembisa+277-882-255-28 abortion pills for sale in tembisa
%in tembisa+277-882-255-28 abortion pills for sale in tembisa
CHEAP Call Girls in Pushp Vihar (-DELHI )🔝 9953056974🔝(=)/CALL GIRLS SERVICE
CHEAP Call Girls in Pushp Vihar (-DELHI )🔝 9953056974🔝(=)/CALL GIRLS SERVICE
Crypto Cloud Review - How To Earn Up To $500 Per DAY Of Bitcoin 100% On AutoP...
Crypto Cloud Review - How To Earn Up To $500 Per DAY Of Bitcoin 100% On AutoP...
Payment Gateway Testing Simplified_ A Step-by-Step Guide for Beginners.pdf
Payment Gateway Testing Simplified_ A Step-by-Step Guide for Beginners.pdf
%in Durban+277-882-255-28 abortion pills for sale in Durban
%in Durban+277-882-255-28 abortion pills for sale in Durban
Oracle Performance Tuning Fundamentals
1.
Oracle Performance Tuning Fundamentals Carlos
Sierra
2.
• Oracle Performance
and SQL Tuning • Consultant/Developer/DBA • eDB360 and eAdam • SQLT and SQLHC • Exadata Carlos Sierra Enkitec (c) 2014 2
3.
Oracle Performance Tuning
Fundamentals • Motivation • Times and Metrics • Wait Events • Statistics • Some Myths Enkitec © 2014 3
4.
Why Performance Tuning? •
Performance is about Time – Comply with Service Level Agreements (SLA) – Affects User Experience – Restricts Scalability Enkitec © 2014 4
5.
Why Performance Tuning
is hard? • Concurrency – More than one user • Dynamism – Constant Change • Complexity – Too many knobs and software layers Enkitec © 2014 5
6.
Performance Tuning Approaches •
“Top-down” • “Bottom-up” • “Holistic” • “Random” a.k.a. “Trial and Error” • “Silver Bullets” a.k.a. “One Size Fits All” Enkitec © 2014 6
7.
Back to Basics •
Understand your Operating System • Understand your Database • Understand your Business • Understand your Users • Understand your Options Enkitec © 2014 7
8.
System Resources • CPU •
Memory • Disk Space • Throughput – IOPS – MBPS Enkitec © 2014 8
9.
OS Performance Monitoring
Tools • sar • top and htop • mpstat and vmstat • iotop and iostat • dtrace and strace Enkitec © 2014 9
10.
Enkitec © 2014
10
11.
OS Tools Strategy •
Define your own subset of Tools to use • Learn them well • Create some Scripts or use a GUI • Correlate DB Performance to OS Monitoring • Work with your System Administrator Enkitec © 2014 11
12.
OS Statistics within
Oracle • Provides a high-level view of OS • Cumulative Metrics • Views – V$OSSTAT – DBA_HIST_OSSTAT Enkitec © 2014 12
13.
Oracle Architecture • Database –
Data Files + Temp Files + Redo Log + Control Files • Instance – SGA + PGA + Processes • RAC Enkitec © 2014 13
14.
Enkitec © 2014
14
15.
Enkitec © 2014
15
16.
Service and Wait
Times • Service Time ≈ Time on CPU (productive) • Wait Time (overhead) – Non-idle (actively waiting) • Associated to the DB – Idle (non-productive from DB perspective) • Outside the DB Enkitec © 2014 16
17.
Timed Events • On
CPU + Non-idle Wait Events • There are hundreds of Wait Events – Wait Events are rolled up into 12 Wait Classes • Wait Events represent System Calls Enkitec © 2014 17
18.
Elapsed Time • Time
between two measurements – Usually between two snapshots • Same as Wall Clock Time • Foundation of User Experience Enkitec © 2014 18
19.
Database Time • Time
in User Calls – Include CPU Time and non-idle Waits – Exclude background processes – Exclude idle Waits • Can be higher than Elapsed Time – 3 users performing some work for example Enkitec © 2014 19
20.
CPU Time • a.k.a.
“DB CPU” or “CPU used by this session” • Time spent on the CPU by the database • It does not include time waiting for CPU Enkitec © 2014 20
21.
Database CPU Time
Ratio • Percentage of CPU/DB Time • Example: – DB Time is 3 hours – CPU Time is 2 hours – Database CPU Time Ratio is 67% • Note: DB CPU Time Ratio does not tell much Enkitec © 2014 21
22.
CPU Count • Number
of CPUs available to Database • Parameter CPU_COUNT – V$SYSTEM_PARAMETER2 • Influences CBO, PX, RM and Log Buffer • Default of 0 means: dynamically get OS value – OS Number of CPUs reported Enkitec © 2014 22
23.
Number of CPUs •
As reported by OS • Visible through V$OSSTAT – STAT_NAME = ‘NUM_CPUS’ • CPU_COUNT and NUM_CPUS could have the same value – But they don’t have to Enkitec © 2014 23
24.
CPU Capacity • Database –
V$SYSTEM_PARAMETER2 – CPU_COUNT • Host – V$OSSTAT (or sar) – NUM_CPUS Enkitec © 2014 24
25.
DB CPU Utilization •
Percent of CPU in use over CPU capacity • DB CPU in use – DB CPU Time / Elapsed Time • DB CPU Utilization – 100 * (DB CPU Time / Elapsed Time) / CPU_COUNT Enkitec © 2014 25
26.
DB CPU Utilization
Example • DB CPU Time = 5400 seconds • Elapsed Time = 30 minutes • CPU_COUNT = 8 • DB CPU in use = (5400 / 60) / 30 = 3 • DB CPU Utilization = 100 * 3 / 8 = 37.5% • 37.5% of the CPUs available to database Enkitec © 2014 26
27.
Host CPU Utilization •
% Busy / (Busy + Idle) • STAT_NAME from V$OSSTAT – BUSY_TIME – IDLE_TIME Enkitec © 2014 27
28.
Host CPU Utilization
Example • V$OSSTAT.STAT_NAME and VALUE – BUSY_TIME = 98683306 – IDLE_TIME = 4282578783 • Host CPU Utilization – 100 * 98683306 / (98683306 + 4282578783) – 2.2% Enkitec © 2014 28
29.
CPU Utilization Concern •
When > 70% – Expect “lag” affecting User Experience – May or may not recover depending on workload • When > 95% – Most reported times become distorted – Hard to recover without suspending workload Enkitec © 2014 29
30.
What burns lots
of CPU? • Buffer Gets • Parsing • Logon storm • Mutex Waits • Note: Use ASH and look for “ON CPU” Enkitec © 2014 30
31.
Enkitec © 2014
31 Quiz: Compute DB CPU Utilization • DB CPU in use: (9,641 / 60) / 10.03 = 16 • DB CPU Utilization: 100 * 16 / 98 = 16.3%
32.
Enkitec © 2014
32 Quiz: Compute Host CPU Utilization • Host CPU Utilization: % BUSY / (BUSY + IDLE) • 1,932,526 / (1,932,526 + 7,722,855) = 20%
33.
Enkitec © 2014
33 Quiz: Compute DB CPU Utilization • DB CPU in use: (109,778 / 60) / 120.36 = 15.2 • DB CPU Utilization: 100 * 15.2 / 16 = 95%
34.
Enkitec © 2014
34 Quiz: Compute Host CPU Utilization • Host CPU Utilization: % BUSY / (BUSY + IDLE) • 11,274,354 / (11,274,354 + 228,971) = 98%
35.
What is a
Wait Event? • V$EVENT_NAME • 1,152 on 11.2.0.3 • P1, P2, P3 Parameters – Oracle Database Reference • C Oracle Wait Events • 12 Wait Classes Enkitec © 2014 35
36.
Non-idle Waits • Overhead •
Actively Waiting inside the database • Examples – Reading a Block from Disk – Index Rebuild – Application Row level Lock Enkitec © 2014 36
37.
Idle Waits • Overhead •
Inactive • Waiting for work • Outside the database Enkitec © 2014 37
38.
Performance Statistics • Wait
Events refer to Time and Times • Statistics refer to Counters – How many of “X” so far (from Instance startup) – Examples • Sorts • Consistent Gets Enkitec © 2014 38
39.
Statistics a.k.a. Counters •
V$STATNAME • 638 Counters on 11.2.0.3 • Description – Oracle Database Reference • E Statistics Descriptions • 8 Statistics Classes Enkitec © 2014 39
40.
Using Waits and
Statistics • Waits respond to – What, When, Where, Who, How Long • Statistics help with – Why Enkitec © 2014 40
41.
Session Type and
State • Foreground Type – User Session • Background Type – Database Processes • State – On CPU or on Waiting State Enkitec © 2014 41
42.
System Time Model
(1) • V$SYS_TIME_MODEL • V$SESS_TIME_MODEL • Cumulative Time with no wrapping • Tree with 19 nodes – Two root nodes Enkitec © 2014 42
43.
System Time Model
(2) • Two root nodes – DB (Elapsed) Time – Background Elapsed Time – Notes: • Children do not necessarily add up to the parent • Children are not necessarily exclusive • The union of children does not cover the whole of the parent Enkitec © 2014 43
44.
System Time Model
(3) Enkitec © 2014 44 1) background elapsed time 2) background cpu time 3) RMAN cpu time (backup/restore) 1) DB time 2) DB CPU 2) connection management call elapsed time 2) sequence load elapsed time 2) sql execute elapsed time 2) parse time elapsed 3) hard parse elapsed time 4) hard parse (sharing criteria) elapsed time 5) hard parse (bind mismatch) elapsed time 3) failed parse elapsed time 4) failed parse (out of shared memory) elapsed time 2) PL/SQL execution elapsed time 2) inbound PL/SQL rpc elapsed time 2) PL/SQL compilation elapsed time 2) Java execution elapsed time 2) repeated bind elapsed time
45.
Average Active Session
(AAS) • Common unit to measure Performance • What is an “Active Session”? – One “On CPU” or on a “Non-idle Wait Event” • Two ways to compute AAS 1. Using count of Active Sessions on a Snapshot 2. Database Time divided over Wall Clock Time Enkitec © 2014 45
46.
Enkitec © 2014
46 WORKLOAD REPOSITORY report for DB Name DB Id Instance Inst Num Startup Time Release RAC ------------ ----------- ------------ -------- --------------- ----------- --- XXX 1319103893 XXX 1 10-Apr-14 14:55 11.2.0.3.0 NO Host Name Platform CPUs Cores Sockets Memory(GB) ---------------- -------------------------------- ---- ----- ------- ---------- xxxxxxxx AIX-Based Systems (64-bit) 16 4 72.00 Snap Id Snap Time Sessions Curs/Sess --------- ------------------- -------- --------- Begin Snap: 139 11-Apr-14 15:00:58 217 144.9 End Snap: 140 11-Apr-14 15:15:58 218 145.7 Elapsed: 15.01 (mins) DB Time: 83.46 (mins) Cache Sizes Begin End ~~~~~~~~~~~ ---------- ---------- Buffer Cache: 23,360M 23,360M Std Block Size: 8K Shared Pool Size: 1,664M 1,664M Log Buffer: 11,848K Load Profile Per Second Per Transaction Per Exec Per Call ~~~~~~~~~~~~ --------------- --------------- ---------- ---------- DB Time(s): 5.6 1.7 0.02 0.11 DB CPU(s): 0.2 0.1 0.00 0.00 Redo size: 238,783.6 72,491.8 Logical reads: 2,300.9 698.5 Block changes: 626.3 190.2 Physical reads: 3.9 1.2 Physical writes: 28.8 8.7 User calls: 48.4 14.7 Parses: 14.3 4.3 Hard parses: 0.0 0.0 W/A MB processed: 0.1 0.0 Logons: 0.1 0.0 Executes: 317.3 96.3 Rollbacks: 1.1 0.3 Transactions: 3.3
47.
Basic DB Performance
Collection • System-wide Waits – Cumulative • Session Waits – Cumulative and Current • Session and System-wide Statistics Counters – Cumulative Enkitec © 2014 47
48.
Key Dynamic Views •
V$SESSION_WAIT – Current or Last Wait (session specific) • V$SESSION_EVENT – Total Waits for Events (session specific) • V$SYSTEM_EVENT – Total Waits for Events (system-wide) Enkitec © 2014 48
49.
Real-life use of
Dynamic Views • SQL*Plus Scripts – Your own or Tanel Poder’s “snapper.sql” • Current and legacy Tools – OEM, AWR, ADDR, ASH, Statspack, bstat/estat • Other Scripts and Tools Enkitec © 2014 49
50.
Automatic Workload Repository
(AWR) • Requires Oracle Diagnostics Pack License • 112 DBA_HIST Views on 11.2.0.3 • Snapshots – One hour interval (default) – One week retention (default) Enkitec © 2014 50
51.
Active Session History
(ASH) • Requires Oracle Diagnostics Pack License • Multi-dimension • V$ACTIVE_SESSION_HISTORY – One snapshot (sample_id) every second • DBA_HIST_ACTIVE_SESS_HISTORY – One sample_id out of every 10 Enkitec © 2014 51
52.
Warning • Take “Rules
of Thumb” with a pinch of salt and do not confuse them with “Myths” • Rule of Thumb “a principle with broad application that is not intended to be strictly accurate or reliable for every situation” • Myth “a widely held but false belief or idea” Enkitec © 2014 52
53.
Some Myths (1) •
Change nothing and Performance will remain the same (i.e. Freeze CBO Statistics) • Parallelize as much as possible and everything will run faster • Improve Buffer Hit Ratio and Performance will improve Enkitec © 2014 53
54.
Some Myths (2) •
An Index Access operation is better than a Full Table Scan • Placing Tables and Indexes on separate Tablespaces provides better performance • Reorganize all Indexes periodically for better performance Enkitec © 2014 54
55.
Some Myths (3) •
Upgrading to faster CPUs results on better performance • Allocate to Oracle more Memory and Processes will run faster • Segments (Tables or Indexes) with one Extent perform better Enkitec © 2014 55
56.
Some Myths (4) •
SQL cannot be modified (canned application) • A truncated SQL Trace cannot be used for Diagnostics • Top-5 Wait Events show the root cause of the poor Performance • Silver Bullets are “fixes” Enkitec © 2014 56
57.
Performance Methodology in
a Nut Shell • Listen to the voice of the Business • Collect Diagnostics and compare to Baselines • Identify Pain and Resources Bottlenecks • Mitigate Pain by addressing Bottlenecks – Reach out when needed – Learn and document Enkitec © 2014 57
58.
Conclusions • User Experience
should be the driver – Authentic Business Requirements • Question Everything – Apply Scientific Method: Test, Prove or Debunk • Balance between broad with deep analysis • Diagnose with sound Scripts and Tools Enkitec © 2014 58
59.
References • Oracle Database
Reference 11g Release 2 • Oracle Database Concepts 12c Release 1 • Snapper - Tanel Poder – http://blog.tanelpoder.com/files/scripts/snapper 4.sql Enkitec © 2014 59
60.
Contact Information • carlos.sierra@enkitec.com •
carlos-sierra.net • @csierra_usa Enkitec © 2014 60
Baixar agora