data guard performance

8/18/2019 Data Guard Performance

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Copyright © 2012, Oracle and/or its affiliates. All rights reserved.1

Oracle Active Data Guard

Performance

Joseph Meeks

irector, !rod"ct Manage#ent

Oracle $igh Availa%ility &yste#s


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Note to viewer

'hese slides provide vario"s aspects of perfor#ance da

ata ("ard and Active ata ("ard ) *e are in the proc

"pdating for Oracle ata%ase 12c.

+t can %e shared *ith c"sto#ers, %"t is not intended to %

canned presentation ready to go in its entirety

+t provides &Cs data that can %e "sed to s"%stantiate

perfor#ance or to provide foc"sed ans*ers to partic"la

that #ay %e e-pressed %y c"sto#ers.


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Copyright © 2012, Oracle and/or its affiliates. All rights reserved.

Note to viewer

&ee this A for #ore c"sto#er and sales co ) http//data%ase."s.oracle.co#/pls/ht#ld%/f

p301451016516710677!458+,!458A9:A+214


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Agenda – Data Guard Performance

ailover and &*itchover 'i#ings

&;


5/39Copyright © 2012, Oracle and/or its affiliates. All rights reserved.5

ata ("ard 12.1 :-a#ple = aster ailover

# of database

sessions onprimary and

6 seconds2,000 sessions

on %oth pri#ary

and stand%y

! r e l i # i

n a r y


6/39Copyright © 2012, Oracle and/or its affiliates. All rights reserved.7

ata ("ard 12.1 :-a#ple ) aster &*itchove

# of databasesessions on

primary andstandby

> seconds500 sessions on

%oth pri#ary and

stand%y

42 seconds1,000 sessions on%oth pri#ary and

stand%y

! r e l i # i

n a r y


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Agenda – Data Guard Performance

ailover and &*itchover 'i#ings

&;


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Copyright © 2012, Oracle and/or its affiliates. All rights reserved.>

Synchronous Redo Transport

!ri#ary data%ase perfor#ance is i#pacted %y the total ro"nd=

ackno*ledge#ent to %e received fro# the stand%y data%ase

) ata ("ard


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Copyright © 2012, Oracle and/or its affiliates. All rights reserved.E

Test ! Synchronous Redo Transport

orkload ) 9ando# s#all inserts ?O@'! to E ta%les *ith 4>4 co##its

) 12 B redo siFe, 17> logical reads, 7E2 %lock changes pe

&"n ire G6>00 M2 ?:-adata G2=>

)1 'H 9AM, 76 Cores, Oracle ata%ase 11.2.0., Oracle @i

) +nfiniHand, seven :-adata cells, :-adata &oft*are 11.2..2

:-adata art lash, art lash @ogging and rite=H

ena%led provided significant gains

O@'! *ith 9ando# all +nsert I 1#s 9''


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Test ! Synchronous Redo Transport

@ocaI1#

EEM

I1

data

thro" 1 i

trans

O@'! *ith 9ando# all +nserts and I 1#s 9''


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Test "! Synchronous Redo Transport

:-adata G2=>, 2=node 9AC data%ase ) s#art flash logging, s#art *rite %ack flash

&*ing%ench O@'! *orkload

) 9ando# M@s, 1 #s think ti#e, 600 "sers, 7000K transac

second, 0MH/s peak redo rate ?different fro# test 2

'ransaction profile

) 5B redo siFe, 120 logical reads, 0 %lock changes per tran

1 and 5#s 9'' net*ork latency

&*ing%ench O@'! orkload *ith Metro=Area


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Test "! Synchronous Redo Transport

0 M

i

1#s

5 i

5#s

&*ing%ench O@'! orkload *ith Metro=Area


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Test *! Synchronous Redo Transport


@arge insert O@'! *orkload

) 1>0K transactions per second, >MH/s peak redo rate, ran

'ransaction profile ) 660B redo siFe, 7000 logical reads, 2100 %lock changes pe

1, 2 and 5#s 9'' net*ork latency

@arge +nsert O@'! orkload *ith Metro=Area


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0

50

100

150

200

Test *! Synchronous Redo Transport

> M I1

at 1

4

2#s

12

5#s

@arge +nsert O@'! orkload *ith Metro=Area


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Test 0! Synchronous Redo Transport


Mi-ed *orkload *ith high '!&

) &*ing%ench pl"s large insert *orkloads

) 27000K t-n per second and 112 MH/sec peak redo rate

'ransaction profile

) 6B redo siFe, 51 logical reads, 22 %lock changes per trans

1, 2 and 5#s 9'' net*ork latency

Mi-ed O@'! *orkload *ith Metro=Area


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Additional S$N% %onfiguration Details


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Copyright © 2012, Oracle and/or its affiliates. All rights reserved.1>

%ustomer References for S$N% Transp

annie Mae Case &t"dy that incl"des perfor#ance data

Other &;


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Copyright © 2012, Oracle and/or its affiliates. All rights reserved.1E

Synchronous Redo Transport

9edo rates achieved are infl"enced %y net*ork latency, siFe, and co##it conc"rrency ) in a dyna#ic relationsh

other that *ill vary for every environ#ent and application

'est res"lts ill"strate ho* an e-a#ple *orkload can sca

i#pact to pri#ary data%ase perfor#ance

Act"al #ileage *ill vary *ith each application and enviro

Oracle reco##ends c"sto#ers cond"ct their o*n tests,

*orkload and environ#ent. Oracle tests are not a s"%sti

Caveat that Applies to A@@ &;


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Agenda

ailover and &*itchover 'i#ings &;


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Asynchronous Redo Transport

A&;


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Asynchronous Test %onfiguration

100(H online redo logs

@og %"ffer set to the #a-i#"# of 257MH

O& #a- 'C! socket %"ffer siFe set to 12>MH on pri#ary and s

Oracle


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AS$N% Redo Transport Performance T

&ingle +nstance0

100

200

00

600

500

700 ata ("ard A&;6 MH/sec on single node

‒ Dero transport lag

Add 9AC nodes to scale transpor

‒ :ach node generates its o*n redo t

dedicated ata ("ard transport pro

‒!erfor#ance *ill scale as nodes areade"ate C!L, +/O, and net*ork re

A 10(ig:


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Data Guard g Streaming Networ& Pro

&trea#ing protocol is ne* *ith

'est #eas"red thro"ghp"t *ith 0

A&;


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Agenda



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2ulti3Stand4y %onfiguration

A gro*ing n"#%er of c"sto#ers "se #"lti=

("ard config"rations. Additional stand%ys are "sed for

) @ocal Fero data loss $A failover *ith re#ote

) 9olling #aintenance to red"ce planned do*

) Offloading %ack"ps, reporting, and recovery

) 9eader far#s ) scale read=only perfor#anc 'his leads to the "estion $o* is pri#ary

perfor#ance affected as the n"#%er of re#

destinations increases

Primary 3 A 'ocal Stand4y 3 #

Remote

Stand4y 3 %

S$N%

AS$N%


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Redo Transport in 2ulti3Stand4y %onfi

E4.0

E>.0

EE.0100.0

101.0

102.0

10.0

106.0

105.0

!ri#ary !erfor#ance +#pact 16 Asynchrono"s 'ransport

E.0

E6.0

E5.0

E7.0E4.0

E>.0

EE.0

100.0

101.0

102.0

+ncrease in C!L

?co#pared to %aseline

Change in re

?co#pared to

0 = 16 destinations 0 =16 desti


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Copyright © 2012, Oracle and/or its affiliates. All rights reserved.2E

Redo Transport for Gap Resolution

&tand%y data%ases can %e config"red to re"est log fileresolve gaps fro# other stand%ys in a #"lti=stand%y con

A stand%y data%ase that is local to the pri#ary data%ase

the preferred location to service gap re"ests

) @ocal stand%y data%ase are least likely to %e i#pacted %y n

) Other stand%ys are listed ne-t

) 'he pri#ary data%ase services gap re"ests only as a last

) LtiliFing a stand%y for gap resol"tion avoids any overhead

data%ase

A d


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Agenda



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Redo Transport %ompression

'est config"ration

) 12.5 MH/second %a

) 22 MH/second redo

Lnco#pressed vol"#

availa%le %and*idth

) 9ecovery !oint O%

i#possi%le to achie

) perpet"al increase 50 co#pression rat

) vol"#e I %and*idt

) ratio *ill vary acros

9e"ires Advanced

Conserve Hand*idth and +#prove 9!O *hen Hand*idth C

"" 2#-secuncompressed

" 2#-seccompressed

:lapsed 'i#e = Min"tes

'ransport

@ag = MH

A d


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Agenda



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Copyright © 2012, Oracle and/or its affiliates. All rights reserved.

Stand4y Apply Performance Test

9edo apply *as first disa%led to acc"#"late a large n"#%

at the stand%y data%ase. 9edo apply *as then restarted to#a- apply rate for this *orkload.

All stand%y log files *ere *ritten to disk in ast 9ecovery A

:-adata rite Hack lash Cache increased the redo apply

42MH/second to 146MH/second "sing test *orkload ?Orac

) Apply rates *ill vary %ased "pon platfor# and *orkload

Achieved vol"#es do not represent physical li#its

) 'hey only represent the partic"lar test case config"ration and

higher apply rates have %een achieved in practice %y prod"ct

Apply Performance at Stand4y Data4as


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'est 1 no *rite

cache On :-adata -2

&*ing %ench O

42 MH/second

)+/O %o"nd d"

) 1,472#s for

co#plete

) 110#s H



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'est 2 a repeat of

test %"t *ith *rite=

cache ena%led

On :-adata -2=2

&*ing %ench O@'

146 MH/second ap

) Checkpoint co#7#s vs 1,472

) H ile !arallel

21#s vs 110#s

Two Production %ustomer 51amples


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Two Production %ustomer 51amples

'ho#son=9e"ters ) ata areho"se on :-adata, prior to *rite=%ack flash cach

) hile resolving a gap of o%served an average apply rate o

Allstate +ns"rance

) ata areho"se :'@ processing res"lted in average apply

ho"r period of 77>MH/second, *ith peaks hitting E00MH/se

ata ("ard 9edo Apply !erfor#ance

Redo Apply Performance for Different R


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Redo Apply Performance for Different R

0100200.00600

500700400

$ig

$ig

9ange of O%served Apply 9ates for Hatch and O@'!

&tand%y

Apply

9ate

MH/sec

data guard performance

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