Tutorial3 Oracle

8/20/2019 Tutorial3 Oracle

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Oracle Database 10g

The Self-Managing Database

Benoit Dageville

Oracle [email protected]


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Agenda

Oracle10g: Oracle’s first generation of

self-managing database

Oracle’s Approach to elf-managing

Oracle10g !anageabilit" #o$ndation

A$tomatic Database Diagnostic !onitor %ADD!&

elf-managing Components

Concl$sion and #$t$re Directions


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Oracle10g


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Oracle10g

Oracle10g is the latest version of the Oracle

DB!' released earl" (00)

One of the main foc$s of that release *as self-

management + ,ffort initiated in Oraclei

O$r vision *hen *e started this vent$re fo$r

"ears ago: mae Oracle f$ll" self-manageable /e believe Oracle10g is a giant step to*ard this

goal


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Oracle’s

Approach


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Oracle’s Approach: Server Resident

echnolog" b$ilt inside the database server + ,liminate management problems rather than hiding2 them

behind a tool

+ !inimi3e 4erformance 5mpact

+

Act 6$st in ime2 %e.g. p$sh vers$s p$ll& + 7everage e8isting technolog"

+ ,ffective sol$tions re9$ire complete integration *ith vario$sserver components

server becoming so sophisticated that a tool based

sol$tion can no longer be tr$l" effective + !andator" if the end-goal is to b$ild a tr$l" self-managing database server


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Oracle’s Approach: Seamless !"

"ntegration


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Oracle’s Approach: #olistic

Avoid a collection of point sol$tions

5nstead' b$ild a comprehensive sol$tion + Core manageabilit" infrastr$ct$re

Comprehensive statistics component

/orload epositor"

erver based alerts

Advisor" frame*or

+ Central self-diagnostic engine b$ilt into core database %A$tomatic DatabaseDiagnostic !onitor or ADD!&

+ elf-managing Components

A$to !emor" !anagement' A$tomatic ;7 $ning' A$tomatic torage!anagement' Access Advisor' A$to


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Oracle’s Approach: O$t-of-bo%

!anageabilit" feat$res are enabled b" defa$lt + #eat$res m$st be ver" rob$st

+ !inimal performance impact

+ O$tperform man$al sol$tion

+ elf-managing sol$tion has to be self-manageable>

?ero administrative b$rden on DBAs

,8amples + tatistics for manageabilit" enabled b" defa$lt

+ A$tomatic performance anal"sis ever" ho$r

+ A$to !emor" !anagement of ;7 memor" is defa$lt

+ Optimi3er statistics refreshed a$tomaticall"

+ 4redefined set of server alerts %e.g. space' =& + And m$ch more=..


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7o* ,nd C$stomers + o dedicated administrative staff

+ A$tomated da" to da" operations

Optimal performance o$t of the bo8' no need to set config$rationparameters

igh ,nd C$stomers + #le8ibilit" to adapt prod$ct to their needs

+ elf-management feat$res sho$ld o$tperform man$al t$ning andens$re predictable behavior

+ eed to $nderstand and monitor f$nctioning of self-management

operations

elp DBAs in maing administrative decisions %no need for DBA tobe rocet scientist>&

An" *orload: O74' D' mi8ed

Oracle’s Approach:Manageabilit& for All


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Application ' S()Management

S&stem Reso$rceManagement

SpaceManagement

*ac+$p ' Recover&Management

StorageManagement

Database,ontrol

.M/

ADDM

Oracle’s Approach: Manageabilit& Architect$re

Manageabilit& "nfrastr$ct$re


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S&stem Reso$rceManagement

SpaceManagement


StorageManagement

ADDM



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Manageabilit& "nfrastr$ct$re:Overvie

or+load Statistics

S$bs&stem

A$tomatic Maintenance Tas+"nfrastr$ct$re

Server-generated Alert"nfrastr$ct$re

Advisor&"nfrastr$ct$re

#o$ndation for elf-managing or+load Statistics S$bs&stem

– "ntelligent Statistics – AR: 2Data areho$se3 of

the Database

A$tomatic Maintenance Tas+s – 4re-pac+aged5 reso$rce

controlled

Server-generated Alerts – 4$sh vs6 4$ll5 7$st-in-time5

O$t-of-the-bo%

Advisor& "nfrastr$ct$re – "ntegrated5 $niformit&5 enable

inter-advisor comm$nication


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Statistics: Overvie

ADDM

Alerts

"n memor&statistics

or+load Repositor&

Shared-Memor&

89 8ies

#istoricalStatistics

Statistic Snapshot


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Statistics: ,lasses

Database ime !odel

+


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Statistics: Database Time Model

Operation Centric + Connection !anagement + Compilation + ;7' 47;7 and 6ava e8ec$tion

times

User I/O

Application

Cluster Concurrency

SQL Exec

PLSQL Exec

Connection Mgmt

Compilation

Java Exec

eso$rce Centric + ard*are: C4


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Statistics: Sampled DatabaseActivit&

5n-memor" log of e" attrib$tes of databasesessions activit"


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Statistics: Sampled DatabaseActivit&

D* Time

5DF(1G

/A55E

tate

Bloc read9aG()ffritcf (1GH:GI:(J

/ait;7 5D!od$le5Dime

C4


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Statistics: hat-if Overvie/

4redict performance impact of changes in amo$nt of memor" allotted to acomponent' both decrease and increase.

ighl" acc$rate' maintained a$tomaticall" b" each memor" component basedon *orload.


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Statistics: hat-if .%ample/

ed$cing b$ffer cache si3e to 10!B increases 5Os b" a (.K factor

5ncrease b$ffer cache si3e to K0!B *ill red$ce 5Os b" (0M

89D*,A,#.AD8",.


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*ase Statistics = e6g6 S()

!aintained b" the Oracle c$rsor cache

;7 id + $ni9$e te8t signat$re

ime model brea-do*n ampled bind val$es

;$er" ,8ec$tion 4lan

#ine-grain ,8ec$tion tatistics %iterator level&

,fficient top ;7 identification $sing Ns


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AR: A$tomatic or+loadRepositor&

elf-!anaging epositor" of Database /orload tatistics + 4eriodic snapshots of in-memor" statistics stored in database

+ Coordinated data collection across cl$ster nodes

+ A$tomaticall" p$rge old data $sing time-based partitioned tables

+

O$t-Of-he-Bo8: H da"s of data' 1-ho$r snapshots Content and ervices

+ ime model' ampled DB Activit"' op ;7' op obects' =

+ ;7 $ning ets to manage ;7 /orloads

Cons$mers

+ ADD!' Database Advisors %;7 $ning' pace' =&' ... + istorical performance anal"sis


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A$tomatic DatabaseDiagnostic Monitor ADDM/


S&stem Reso$rce

Management

SpaceManagement


Storage

Management

ADDM



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ADDM: Motivation

4roblem: 4erformance t$ning re9$ires high-e8pertise and ismost time cons$ming tas

4erformance and /orload Data Capt$re + "stem tatistics' /ait 5nformation' ;7 tatistics' etc.

Anal"sis + /hat t"pes of operations database is spending most time on

+ /hich reso$rces is the database bottleneced on

+ /hat is ca$sing these bottlenecs

+ /hat can be done to resolve the problem

4roblem esol$tion + 5f m$ltiple problems identified' *hich is most critical + o* m$ch performance gain 5 e8pect if 5 implement this sol$tion


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ADDM: Overvie

Diagnose component of the s"stem *ide self-managing loop = and the entr" point of the resolve phase

Central !anagement ,ngine + 5ntegrate all components together

+ olistic time based anal"sis

+ hro$ghp$t centric top-do*n approach + Disting$ish s"mptoms from ca$ses %i.e root ca$se anal"sis&

$ns proactivel" o$t of the bo8 %once ever" ho$r& + es$lt of each anal"sis is ept in the *orload repositor"

Can be $sed reactivel" *hen re9$ired

ADD! is the s"stem-*ide optimi3er of the database


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S()Advisor

#igh-load

S()

"O > ,4!

iss$esRA, iss$es

A$tomatic Diagnostic .ngine

Snapshots in

A$tomatic or+load

Repositor&

Self-Diagnostic .ngine

S&stemReso$rce

Advice

;etor+ ?D* config

Advice

op Do*n Anal"sis


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ADDM: Methodolog&4roblem classification s&stem

Decision tree based on the /ait !odel and ime !odel……

Wait Model

Cluster

User I/O

Concurrency

……

Buffer Busy

Parse Latches

Buf Cache latches

……

Root CausesSymptoms


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ADDM: Ta%onom& of indings

ard*are eso$rce 5ss$es + C4< %capacit"' top-s9l' =&

+ 5Os %capacit"' top-s9l' top-obects' $ndersi3ed memor" cache& + Cl$ster 5nterconnect

+ !emor" %O paging&

oft*are eso$rce 5ss$es

+ Application locs

+ 5nternal contention %e.g. access to db b$ffers&

+ Database Config$ration

Application 5ss$es + Connection management

+ C$rsor management %parsing' fetching' =&


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ADDM: Real-orld .%ample eported b" ;$alcomm *hen $pgrading to Oracle10g

After $pgrading' ;$alcomm noticed severe performance degradation

7ooed at last ADD! report

ADD! *as reporting high-cp$ cons$mption

+ and identified the root ca$se: a ;7 statement

ADD! recommendation *as to t$ne this statement $sing A$tomatic ;7

t$ning A$tomatic ;7 t$ning identified missing inde8. he inde8 *as created and

performance iss$e *as solved

5n this partic$lar case' inde8 *as dropped b" accident d$ring the $pgradeprocess>


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Self-managing ,omponents


S&stem Reso$rce

Management

SpaceManagement


Storage

Management

ADDM



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Self-managing,omponents

4erformance

ADDM/

A$to S() T$ning

Access Advisor

Memor&

Space

A$to Managed

4rivate - S()/

A$to Managed

Shared - 4ools/

Segment Advisor

!ndo Advisor

A$to StorageManagement

Administration

S()

*ac+$p>Recover&

Reso$rceManager

RMA;

lashbac+

A$to MTTR

A$to Stat ,ollect

Server Alerts


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hared !emor" !anagement +

A$tomaticall" si3e vario$s shared memor" pools %e.g. b$ffer pool' sharedpool' ava pool&

+


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A$tomatic Shared-Memor&Management: T$ning 4ool SiBes

7ava 4ool

Shared 4ool

*$ffer ,ache

7ava 4ool

Shared 4ool

*$ffer ,ache

A$tomaticMemor& Manager

Reconfig$re4rocess


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A$tomatic S() T$ning: ,oncept

D*A

#igh-)oadS()

ADDM

S()or+load

C

Add Missing"nde%es

Modif& S(),onstr$cts

,reate a S()4rofile

ather Missingor Stale Stats

A$tomatic S()T$ning

S() 4rofiling

Access 4athAnal&sis

S() Str$ct$reAnal&sis

S() T$ne

Advisor


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A$tomatic S() T$ning: Overvie

4erformed b" the Oracle 9$er" optimi3er r$nning in t$ning

mode +


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A$tomatic S() T$ning: S() 4rofiling

OptimiBer T$ningMode/

creates$bmit

S() 4rofiling

OptimiBer ;ormal Mode/

o$tp$ts$bmit

S()4rofile

S() T$ningAdvisor

Database

!sers

ell-T$ned

4lan

After C $ s e

4ersistent: *ors across sh$tdo*ns and $pgrades

;7 profiling ideal for pacaged applications %no change to ;7 te8t&


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S() 4rofiling: 4erformance.val$ation

Time -s/

1

10

100

1000

10000

1 5 9 13 17 21 25 29 33 37 41 45 49 53 57 61 65 69

Queries


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A$tomatic S() T$ning: hat-ifAnal&sis

chema changes: invoes access advisor + Comprehensive inde8 sol$tions %b-tree' bitmap' f$nctional&

+ !ateriali3ed vie*s recommendations ma8imi3ing 9$er" re*rite *hileminimi3ing maintenance cost

+ An" combination of the above t*o %e.g. ne* !P *ith an inde8 on it&

+ Consider the entire ;7 *orload

;7 tr$ct$re Anal"sis + elp apps developers to identif" badl" *ritten statements

+ $ggest restr$ct$ring for efficienc" b" anal"3ing e8ec$tion plan

+ ol$tion re9$ires changes in ;7 semantic different from optimi3era$tomatic re*rite and transformation

+ 4roblem categor"

emantic changes of ;7 operators %O 5 vers$s O ,R5&

"ntactic change to predicates on inde8 col$mn %e.g. remove t"pemismatch to enable inde8 $sage&

;7 design %add missing oin predicates&


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,oncl$sion ' $t$re Directions

Oracle10g maor milestone in the Oracle’smanageabilit" 9$est

+ !anageabilit" fo$ndation

+ olistic !anagement Control %ADD!&

+ elf-manageable components

#$t$re + Oracle11g: find an ,P, for ADD!

+

,ven more self-manageable b" f$ll" a$tomatingthe resolve phase


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More "nformation@

Automatic SQL Tuning in Oracle10g,B. age!ille, . a" #. ia", #. $agou%, &. 'ait,&. 'iau((in, )LB 2004Industrial Session 4: Thursday 11:00- 12:30

SQL memor* management in Oracle9i,B. age!ille an( &. 'ait, )LB 2002

Oracle Tec+nical a-er"http:***.oracle.comtechnolog"prod$ctsmanageabilit"

databaseinde8.html


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