sapnote_0001431798

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SAP Note 1431798 - Oracle 11.2.0: Database ParameterSettings

Note Language: English Version: 49 Validity: Valid Since 12.04.2012

Summary

Symptom

This note contains SAP's recommendations for the optimal configuration ofOracle Database Release 11.2. These parameter recommendations are relevantfor all SAP products.

This note will be updated regularly once a month. Beyond that, changes willonly be made in exceptional cases for critical Oracle parameters.

Change history:

o April 12, 2012:

- added parameter DISK_ASYNCH_IO=FALSE (only for HP-UX andstandard file systems, not for OnlineJFS VxFS 5.x, ASM or rawdevices), see SAP note 798194)

- added parameter USE_LARGE_PAGES for Linux platforms and Oraclereleases 11.2.0.2 or higher (SAP note 1672954)

o March 13, 2012:

- added parameter reccommendations for 11.2.0.3 for Exadata andWindows

o February 14, 2012:

- added _FIX_CONTROL '13077335:ON' for Unix for 11.2.0.3

o January 11, 2012:

- added _FIX_CONTROL '13077335:ON' for Unix for 11.2.0.2

o December 21, 2011:

- added parameter reccommendations for 11.2.0.3

o December 13, 2011:

- updated reccommendation for parameter remote_os_authent

o November 10, 2011:

- updated recommendation for parameter log_buffer (SAP note1627481)

- updated recommendation for deprecated parameterremote_os_authent (SAP note 1622837)

o October 27, 2011:

- add WIN 11.2.0.1 to _OPTIMIZER_USE_CBQT_STAR_TRANSFORMATION

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o October 26, 2011:

- updated STAR_TRANSFORMATION_ENABLED ( HotNews 1636936 )

- added _OPTIMIZER_USE_CBQT_STAR_TRANSFORMATION (HotNews 1621425)

o September 13, 2011:

- added _FIX_CONTROL '6055658:OFF' for Windows

o July 13, 2011:

- updated setting for LOG_ARCHIVE_DEST_1 for ASM

o June 10, 2011:

- added parameter recommendations for Exadata and GridInfrastructure

o May 18, 2011: modified description for _ENABLE_NUMA_SUPPORT

o May 12, 2011:

- Parameter recommendations adjusted for Windows 11.2.0.2

- adjusted _FIRST_SPARE_PARAMETER for Unix 11.2.0.2

- adjusted _FIX_CONTROL '4728348:OFF' for Windows 11.2.0.1

- added _FIX_CONTROL '6055658:OFF' for UNIX

- added _MUTEX_WAIT_TIME and _MUTEX_WAIT_SCHEME for 11.2.0.2

o April 12, 2011:

- added parameter _B_TREE_BITMAP_PLANS

- added event 10995

o March 18, 2011:

- corrected the text in brackets for _FIRST_SPARE_PARAMETER and_SECOND_SPARE_PARAMETER

- corrected the date values for _fix_control = '4728348:OFF'

o March 15, 2011: formal change (Change history March 10, 2011)

o March 10, 2011:

- _FIRST_SPARE_PARAMETER for UNIX 11.2.0.1 added

- _SECOND_SPARE_PARAMETER for UNIX 11.2.0.2 added

- Parameter recommendations adjusted for Windows based on theWindows Patch Collections and for UNIX based on the SBP:

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For Windows platforms, the new notation is as follows:

n := number of the Windows Patch Collection

E.g.: WIN 11.2.0.1.nP ( n >= 3)

For Unix platforms, the new notation is as follows:

x := Placeholder for the UNIX PSU (correlates to date)

date := Release Date of UNIX SBP

E.g.: UNIX SBP 11202x_date ( date >= 201103 )

o Feburary 10, 2011: added parameter recommendation for AutomaticStorage Management (ASM), modified recommendation forremote_os_authent, added recommendation for _enable_NUMA_support,removed _fix_control '5483301:OFF'

o January 11, 2011: adjusted _fix_control settings for 11.2.0.1 and11.2.0.2

o November 10, 2010: adjusted _fix_control settings for 11.2.0.2.0

o October 18, 2010: mention of ORA-32006

o October 12, 2010: removed _OPTIMIZER_BETTER_INLIST_COSTING

o September 13, 2010: removed DB_RECOVERY_FILE_DEST,DB_RECOVERY_FILE_DEST_SIZE, DB_WRITER_PROCESSES, LOCAL_LISTENER,LOG_ARCHIVE_DEST

o September 9, 2010: added _FIX_CONTROL '9196440:ON'

o September 9, 2010: added _FIX_CONTROL '8937971:ON'

o June 10, 2010: added _FIX_CONTROL '9495669:ON'

o May 10, 2010: added _FIX_CONTROL '6972291:ON'

o April 19, 2010: Enhanced syntax for EVENT

o March 30, 2010: Note released

Other terms

init.ora, SPFILE, server parameter file, profile

Reason and Prerequisites

This note contains SAP's recommendations for the optimal configurationof the Oracle database with Release 11.2 in SAP environments.

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Please note that the recommendations given in this note may be changed.Therefore, we recommend that you check the latest version of this noteonce a month and make the necessary changes.

General recommendations

Some general recommendations on which parameters should be set:

o Obsolete initialization parameters should be removed from theprofile.

o You should not set any parameters that are not explicitly mentionedin this note unless the parameter is recommended as the solution orworkaround for a problem in another note or it is required to setthe parameter in order to implement an individual configuration.

o For information about the maintenance of parameters in an SFILE,see Note 601157.

o If several EVENT parameters are specified in init<sid>.ora, theymust appear in consecutive rows. You must avoid entering severalevents separated by ":" in one row.

o You should not set parameters that are indicated with "Do not set!"and parameters that are not mentioned at all in the note (and forwhich there is no individual customer requirements). In this case,you use the Oracle default value, which then also appears inV$PARAMETER or in the ST04 parameter overview. This is the intendedbehavior. If you want to ensure that a parameter has not beenexplicitly set, you can enter the following query (<parameter_name>in lower case):SELECT ISDEFAULT FROM V$PARAMETER2 WHERE NAME = '<parameter_name>';If this returns the TRUE statement, then the parameter has not beenexplicitly set.

o You are allowed to optimize memory parameters and resourceparameters such as DB_CACHE_SIZE or DB_WRITER_PROCESSESindividually. Therefore, this note cannot give any generalrecommendations. However, you can determine options foroptimization on the basis of a database performance analysis (seeNotes 618868, 619188, 789011).

o The parameterization described below is directed towards the use ofthe features of the dynamic SGA (Note 617416) and the automatic PGAadministration (Note 619876).

o <SAPDATA_HOME> refers to the value of the environment variableSAPDATA_HOME.

o Paths are given in UNIX syntax. On WINDOWS, you must replace theforward slashes ("/") with back slashes ("\").

o The terms OLAP system and OLTP system have the following meaning:

- OLAP system: These are systems with mainly BW functions (BW/BI, APO with mainly DP usage, SEM-BPS, BW-based SEM-BCS).

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- OLTP system: Systems with mainly non-BW functions (this alsoincludes, for example, Bank Analyzer systems)

o Configure systems with a pure Java stack as you would an OLTPsystem.

o Configure double stack systems (that is, systems with both ABAP andJAVA stacks) as you would an OLTP or OLAP system, depending ondegree to which you use BW functions (see above).

o In a few exceptional cases, if you have a system without OLAP, youcan refrain from setting OLAP specific parameters such asSTAR_TRANSFORMATION_ENABLED, _FIX_CONTROL or _INDEX_JOIN_ENABLED toavoid problems (for example, ORA-04031 due to _FIX_CONTROL, Note997889) or to use functions (for example, index joins). Note thatsuch scenarios are only relevant in very rare situations.Therefore, you do not usually have to deviate from the standardrecommendations.

o If you set parameters depending on a bugfix implementation, therelevant bugfix is specified. The notes referenced containdependent fixes such as WINDOWS patches or merge fixes.

o With REMOTE_OS_AUTHENT=TRUE you will see one of the followingmessages when starting the instance :ORA-32004: obsolete or deprecated parameter(s) specified for RDBMSinstanceORA-32006: REMOTE_OS_AUTHENT initialization parameter has beendeprecated

Automatic Parameter Check

For information about the automatic check of the parameter, see Note1171650.

Description and Explanation of Parameters

For more information on individual parameters, see Note 1289199.

Solution

STANDARD PARAMETER RECOMMENDATIONS FOR ORACLE 11.2.0

Parameter Recommendation------------------------------- ------------------------------------AUDIT_FILE_DEST <SAPDATA_HOME>/saptrace/auditBACKGROUND_DUMP_DEST Deprecated. Do not set! see DIAGNOSTIC_DESTCOMMIT_LOGGING Do not set!COMMIT_WAIT Do not set!COMMIT_WRITE Deprecated. Do not set!COMPATIBLE 11.2.0

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CONTROL_FILE_RECORD_KEEP_TIME 30 or higherCONTROL_FILES At least three copies on different disk areasCORE_DUMP_DEST Do not set! see DIAGNOSTIC_DESTDB_BLOCK_SIZE 8192DB_CACHE_SIZE Size depends on the available memory (Notes 789011, 617416)DB_FILE_MULTIBLOCK_READ_COUNT Do not set!DB_FILES Larger than the number of data files to be expected in the short term (> 200)DB_NAME <db_name>DIAGNOSTIC_DEST <SAPDATA_HOME>/saptraceDISK_ASYNCH_IO FALSE (only on HP-UX, only for standard filesystems, not for OnlineJFS (VxFS 5.x), not for ASM, not for raw devices, see SAP note 798194)EVENT '10027' (Note 596420) '10028' (Note 596420) '10142' (Note 1284478) '10183' (Note 128648) '10191' (Note 128221) '10995 level 2' (Note 1565421) '38068 level 100' (Note 176754) '38085' (Note 176754) '38087' (Note 948197) '44951 level 1024' (Note 1166242)FILESYSTEMIO_OPTIONS SETALL (see the restrictions from Note 999524)HPUX_SCHED_NOAGE 178 (HP-UX only, without RAC)LOG_ARCHIVE_DEST_1

'LOCATION=<SAPDATA_HOME>/oraarch/<sid>arch'LOG_ARCHIVE_FORMAT %t_%s_%r.dbfLOG_BUFFER Set according to SAP note 1627481. Do not set on EXADATA or SPARC Supercluster.LOG_CHECKPOINTS_TO_ALERT TRUEMAX_DUMP_FILE_SIZE 20000NLS_LENGTH_SEMANTICS Do NOT set!!OPEN_CURSORS 800 (up to a maximum of 2000)OPTIMIZER_DYNAMIC_SAMPLING OLTP: Do not set! OLAP: 6OPTIMIZER_FEATURES_ENABLE Do not set! Use the default.OPTIMIZER_INDEX_CACHING Do not set!OPTIMIZER_INDEX_COST_ADJ OLTP: 20 OLAP: Do not set!OPTIMIZER_MODE Do not set!PARALLEL_EXECUTION_MESSAGE_SIZE 16384PARALLEL_MAX_SERVERS #DB-CPU-Cores * 10 (**2)PARALLEL_THREADS_PER_CPU 1PGA_AGGREGATE_TARGET OLTP: 20 % of available memory OLAP: 40 % of available memoryPROCESSES #ABAP work processes * 2 + #J2EE server processes <max-connections> + PARALLEL_MAX_SERVERS + 40

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QUERY_REWRITE_ENABLED FALSERECYCLEBIN OFFREMOTE_OS_AUTHENT TRUE Do not set this parameter for SAP installations with SAP Secure Store (SSFS) for ABAP (see SAP note 1622837), for SAP installations without ABAP stack, or for homogenous SAP installations on WindowsREPLICATION_DEPENDENCY_TRACKING FALSE (if replication is not used)SESSIONS 2 * PROCESSESSHARED_POOL_SIZE 400 MB or greater, refer to Note 690241STAR_TRANSFORMATION_ENABLED TRUE (Note 1636936) UNIX SBP 11202x_date ( date >= 201110 ) UNIX SGR 11202x_date ( date >= 201110 ) UNIX SXD 11202x_date ( date >= 201110 ) UNIX SBP 11203x_date ( date >= 201112 ) UNIX SGR 11203x_date ( date >= 201112 ) UNIX SXD 11203 WIN 11.2.0.2.nP ( n >= 12 ) WIN 11.2.0.3.nP ( n >= 1 )UNDO_RETENTION set if required (refer to Note 600141)UNDO_TABLESPACE PSAPUNDO (Non-RAC, Note 600141)USER_DUMP_DEST Deprecated. Do not set! see DIAGNOSTIC_DESTUSE_LARGE_PAGES can be set on Linux platforms with 11.2.0.2 or higher (SAP note 1672954)_B_TREE_BITMAP_PLANS FALSE (11.2 ohne Fix 9770451, Hinweis 1461804) UNIX SBP 11201x_date ( date <= 201009 ) WIN 11.2.0.1.nP ( n <= 5 )_ENABLE_NUMA_SUPPORT Use Oracle default (=not set) Optional: TRUE after testing (**1)_FIRST_SPARE_PARAMETER 1 (UNIX: 11.2.0.2 with fix 6904068 from Note 1527505) UNIX SBP 11202x_date ( 201011 <= date <= 201104 )_FIX_CONTROL '4728348:OFF' (Note 1547676) UNIX SBP 11201x_date ( date <= 201101 ) UNIX SBP 11202x_date ( date <= 201102 ) WIN 11.2.0.1.nP ( n <= 10 ) '5099019:ON' '5705630:ON' '6055658:OFF' UNIX SBP 11201x_date ( date >= 201105 ) UNIX SBP 11202x_date ( date >= 201105 ) UNIX SGR 11202x_date ( date >= 201106 ) UNIX SXD 11202x_date ( date >= 201106 ) UNIX 11.2.0.3 WIN 11.2.0.1.nP ( n >= 12 ) WIN 11.2.0.2.nP ( n >= 6 ) WIN 11.2.0.3 '6399597:ON' '6430500:ON' '6440977:ON'

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'6626018:ON' '6972291:ON' '8937971:ON' UNIX SBP 11201x_date ( date >= 201009 ) UNIX SBP 11202x_date ( date >= 201011 ) UNIX SGR 11202x_date ( date >= 201106 ) UNIX SXD 11202x_date ( date >= 201106 ) UNIX 11.2.0.3 WIN 11.2.0.1.nP ( n >= 6 ) WIN 11.2.0.2 WIN 11.2.0.3 '9196440:ON' UNIX SBP 11201x_date ( date >= 201009 ) UNIX SBP 11202x_date ( date >= 201011 ) UNIX SGR 11202x_date ( date >= 201106 ) UNIX SXD 11202x_date ( date >= 201106 ) UNIX 11.2.0.3 WIN 11.2.0.1.nP ( n >= 4 ) WIN 11.2.0.2 WIN 11.2.0.3 '9495669:ON' UNIX SBP 11201x_date ( date >= 201006 ) UNIX SBP 11202x_date ( date >= 201011 ) UNIX SGR 11202x_date ( date >= 201106 ) UNIX SXD 11202x_date ( date >= 201106 ) UNIX 11.2.0.3 WIN 11.2.0.1.nP ( n >= 4 ) WIN 11.2.0.2 WIN 11.2.0.3 '13077335:ON' UNIX SBP 11202x_date ( date >= 201201 ) UNIX SGR 11202x_date ( date >= 201201 ) UNIX SXD 11202x_date ( date >= 201203 ) WIN 11.2.0.2.nP ( n >= 16 ) UNIX SBP 11203x_date ( date >= 201202 ) UNIX SGR 11203x_date ( date >= 201202 ) UNIX SXD 11203x_date ( date >= 201203 ) WIN 11.2.0.3.nP ( n >= 3 )_IN_MEMORY_UNDO FALSE UNIX 11.2.0.1 WIN 11.2.0.1_MUTEX_WAIT_TIME 10 (Note 1588876) UNIX SBP 11202x_date (date >= 201105) UNIX SGR 11202x_date (date >= 201106) UNIX SXD 11202x_date (date >= 201106) UNIX 11.2.0.3 WIN 11.2.0.2.nP (date >= 8) WIN 11.2.0.3_MUTEX_WAIT_TIME 4 (Note 1588876) WIN 11.2.0.2.nP (date <= 7)_MUTEX_WAIT_SCHEME 1 (Note 1588876) UNIX SBP 11202x_date (date >= 201105) UNIX SGR 11202x_date (date >= 201106) UNIX SXD 11202x_date (date >= 201106) UNIX 11.2.0.3 WIN 11.2.0.2 WIN 11.2.0.3_OPTIM_PEEK_USER_BINDS FALSE (Note 755342)

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_OPTIMIZER_ADAPTIVE_CURSOR_SHARING FALSE_OPTIMIZER_EXTENDED_CURSOR_SHARING_REL NONE_OPTIMIZER_USE_CBQT_STAR_TRANSFORMATION FALSE (Note 1621425) UNIX 11.2.0.1 UNIX SBP 11202x_date ( date <= 201109 ) UNIX SGR 11202x_date ( date <= 201109 ) UNIX SXD 11202x_date ( date <= 201109 ) UNIX 11.2.0.3 without SBP/SGR/SXD WIN 11.2.0.1 WIN 11.2.0.2.nP ( n <= 12 ) WIN 11.2.0.3.nP ( n < 1 )_OPTIMIZER_USE_FEEDBACK FALSE_SECOND_SPARE_PARAMETER 1 (UNIX: 11.2.0.1 with fix 6904068 from Note 1527504) UNIX SBP 11201x_date (date >= 201011)

(**1) By default, this parameter is not set (=FALSE) and Oracle NUMAsupport (Non Uniform Memory Architecture) is disabled. Before you enableOracle NUMA support in a production system by setting this parameter toTRUE it is necessary to run additional (performance) tests: you need toevaluate the performance before and after enabling NUMA in a testenvironment before you go into production. Additional information can befound in My Oracle Support note 864633.1.(**2) #DB-CPU-Cores is equivalent to the value of database initializationparameter 'CPU_COUNT'

STANDARD PARAMETER RECOMMENDATIONS FOR ASM FROM 11.2.0.2 ON

Note that ASM is only certified for SAP from 11.2.0.2 on (see SAP note1550133). In SAP installations with ASM, the following database parametersneed to be set.

Parameter Recommendation------------------------------- ------------------------------------COMPATIBLE 11.2.0.2.0 (for 11.2.0.2 and 11.2.0.3)CONTROL_FILES At least three copies on different disk groups in ASM

'+ARCH/<DBNAME>/cntrl<DBNAME>.dbf' (1st copy)'+DATA/<DBNAME>/cntrl<DBNAME>.dbf' (2nd copy)'+RECO/<DBNAME>/cntrl<DBNAME>.dbf' (3rd copy)

DB_CREATE_FILE_DEST '+DATA' (data files/temp files)DB_CREATE_ONLINE_LOG_DEST_1 '+DATA' (online redo 1st copy)DB_CREATE_ONLINE_LOG_DEST_2 '+RECO' (online redo 2nd copy)DB_RECOVERY_FILE_DEST '+RECO' (Fast Recovery Area/FRA)DB_RECOVERY_FILE_DEST_SIZE <size of fast recovery area>LOG_ARCHIVE_DEST_1 'LOCATION=+ARCH' (for Single Instance)LOG_ARCHIVE_DEST_1 'LOCATION=+<DGNAME>/<DBNAME>/ORAARCH' (for RAC)

Appendix

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SQL command syntax to specify parameter EVENT in the SPFILESQL> ALTER SYSTEM SET EVENT= '<event_1>', '<event_2>', ... '<event_n>' SCOPE = SPFILE;

Example:SQL> ALTER SYSTEM SET EVENT= '10027', '10028', '38068 level 100' SCOPE=SPFILE;

Entry in SPFILE:*.event='10027','10028','30068 level 100'

SQL command syntax to specify _FIX_CONTROL in the SPFILESQL> ALTER SYSTEM SET "_FIX_CONTROL" = '<bugid_1>:<val_1>', '<bugid_2>:<val_2>', ... '<bugid_n>:<val_n>' SCOPE=SPFILE;

Example:SQL> ALTER SYSTEM SET "_FIX_CONTROL" = '5099019:ON','5705630:ON', '6399597:ON','6430500:ON', '6440977:ON','6626018:ON' SCOPE=SPFILE;

Entry in SPFILE:*._fix_control='5099019:ON','5705630:ON','6399597:ON','6430500:ON','6440977:ON','6626018:ON'

Header Data

Release Status: Released for CustomerReleased on: 12.04.2012 09:28:03Master Language: EnglishPriority: Recommendations/additional infoCategory: ConsultingPrimary Component: BC-DB-ORA Oracle

The Note is release-independent

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Attributes

Attribute Value

Database system ORACLE

Database system Oracle 11.2

sapnote_0001431798

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