Tutorial3 Oracle
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Transcript of 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$re
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Manageabilit& "nfrastr$ct$re
Application ' S()Management
S&stem Reso$rceManagement
SpaceManagement
*ac+$p ' Recover&Management
StorageManagement
ADDM
Manageabilit& "nfrastr$ct$re
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Manageabilit& "nfrastr$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/
Application ' S()Management
S&stem Reso$rce
Management
SpaceManagement
*ac+$p ' Recover&Management
Storage
Management
ADDM
Manageabilit& "nfrastr$ct$re
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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 $pgradeprocess>
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Self-managing ,omponents
Application ' S()Management
S&stem Reso$rce
Management
SpaceManagement
*ac+$p ' Recover&Management
Storage
Management
ADDM
Manageabilit& "nfrastr$ct$re
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Self-managing,omponents
4erformance
ADDM/
A$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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