Best Practices for SAP BI using DB2 9 for z/OS - IBM Redbooks

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Checks under z/OS and DB2 We recommend the following setup and checks at z/OS and DB2 level: ► Workload monitor ► Stored procedures ► DB2 bufferpool Installation of stored procedure SAPCL Starting with NetWeaver 2004s, a new stored procedure, SAPCL, is used to collect DB2 performance data from the Instrumentation Facility Interface (IFI). In previous releases, this function was provided by rfcoscol. Stored procedure SAPCL is available from the SAP Marketplace Web site as part of z/OS 64 bit kernel. Also, since NetWeaver 2004s, CCMS corrections are delivered as part of SAP Basis Support Package and not with specific transports (see 427748). It is important to keep the system updated with the latest support packages in order to have all IFI monitor functions work. We downloaded SAPCAR and SAPDB2CL from the SAP Marketplace. To make SAPCAR work, we set the correct TAGs for automatic conversion with the following chtag command: SC04:/SC04/sap/appo>chtag -t -c iso8859-1 -R SAPCAR After this command, we verified the correct tag: SC04:/SC04/sap/appo>ls -T t ISO8859-1 T=on SAPCAR So we could unpack the SAPDB2CL package that contained the following files: ► sapdb2cl, the stored procedure executable ► DBRM.db2cldb, the database request module We then performed the installation of SAPCL from an SAP GUI. We ensured that the SAP GUI user installing SAPCL had the authorizations and permissions described in the “Permissions, Privileges and Authorizations for SAPCL” section of the SAP Database Guide. 318 Best Practices for SAP BI using DB2 9 for z/OS
Figure B-2 shows how the GUI SAPCL window looked before installing SAPCL. Figure B-2 Before installing SAPCL We then sequentially performed the following actions: 1. Created stored procedure 2. Link-edit edsapdb2cl 3. BIND DBRM 4. WLM refresh 5. Granted usage privileges 6. Created tables Appendix B. SAP BI installation and checks under DB2 and z/OS 319
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Best Practices for SAP BI using DB2
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Note: Before using this information
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4.4 Extended sparse index and in-me
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11.3 SAP BI database and InfoCube l
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viii Best Practices for SAP BI usin
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Trademarks The following terms are
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The team that wrote this IBM Redboo
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Thanks to these authors from the Pr
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► Send your comments in an e-mail
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1.1 Product overview The business w
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In general, database administrators
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► Horizontal growth is achieved b
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8 Best Practices for SAP BI using D
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2.1 BI architecture Figure 2-1 show
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New term Old term Analysis authoriz
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negative values means missing stati
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- When calculating database statist
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If you specify a partitioning schem
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Important: Never partition a PSA ta
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Figure 2-10 DPSIs versus NPSIs Figu
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Finally, Figure 2-12 explains which
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Figure 2-14 shows how the snowflake
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► Realignment This refers to the
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3.1 Base recommendations - SAP BI i
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the F- fact table, the E- fact tabl
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34 Best Practices for SAP BI using
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4.1 Dynamic index ANDing for star s
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Figure 4-2 and Figure 4-3 on page 3
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4.2.1 Processing RUNSTATS for BI ta
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RUNSTATS will then be called over t
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DSNU610I -DB2T 081 16:36:03.85 DSNU
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Often the single-value based freque
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Several things worth noting are:
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The unit of a value specified to MX
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condition, generated by SAP BI upon
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There is a separate IBM Redbooks pu
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5.1 Load PSA In this section we dis
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5.1.1 Load PSA To load data into th
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After the source system, the DataSo
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Note the available tabs (registers)
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Figure 5-8 shows the provided optio
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Figure 5-10 shows the following:
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The PSA table name is created autom
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5.1.4 PSA partitioning Partitioning
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An InfoCube, whether data target or
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6.1 Types of InfoCubes Data targets
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After selecting at least one time d
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6.2.1 Repartitioning implementation
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You will then be presented with a w
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From within the monitor you are abl
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Once your repartitioning process is
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Figure 6-14 is displayed once you h
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When you remodel an InfoProvider yo
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Figure 6-17 demonstrates how you wo
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At this step of the process you are
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6.3.2 Benefits of remodeling InfoPr
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6.4.3 Cumulative data versus non-cu
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Important: After the initial compre
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► Use DPSIs for the cube’s E- f
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7.1 Differences between DataStore a
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Figure 7-1 shows the initial status
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4. By selecting the Create button,
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Partitioning and clustering are bot
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7.4.2 Choosing and changing the clu
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7.4.4 Partitioning a DataStore obje
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From the ABAP Dictionary: Utility f
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Figure 7-9 DB2/390 Storage Attribut
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partitioning was used. The CREATE T
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, "/BIC/RECORDMODE" POSITION( 00289
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Upon completion of the job, you wil
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| "/BIC/DIVISION" VARGRAPHIC (00000
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| sql: | DELETE FROM DDSTORAGE | WH
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| "/BIC/CRMEM_VAL" DECIMAL (000017,
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| DDL time(___8): .........4 millis
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8.1 Troubleshooting general system
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You need to ascertain: ► Which us
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Further information about the subje
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8.2 Analyzing load performance In t
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We use transaction ST03 → Expert
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Click the Details tab of the RSMO w
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Select the component of interest to
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Figure 8-11 All statistical records
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Figure 8-13 Single statistical reco
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Loading from a flat file You can av
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and right-click to select the Simul
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Note: You must activate the saving
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5. In the right-hand panel of the w
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If your query has long run times th
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that the query runs against → Mai
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If the main component of query perf
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► Display Statistics Data (to sho
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Select the appropriate button, ente
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Figure 8-29 Statement details To ch
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The ratio (ST04 statement cache “
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Figure 8-32 Visual Explain - SQL te
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8.5 SAP Query Analysis Tool The SAP
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Display of sql access path SQL quer
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The access path is displayed hierar
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The table information tab shown in
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DB2 Plan Table Figure 8-42 DB2 plan
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Graphical view of each query block
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Now you see the graphical view of t
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8.5.4 Example of using the query an
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9.1 The BIA architecture Figure 9-1
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Figure 9-2 BIA t-shirt sizing The B
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From the hardware side, the BIA is
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9.7 Overview The improvement of the
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10.1 SQL efficiency for DSO Queries
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The first join predicate is "/BIC/A
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Figure 10-5 Associate local predica
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Step 3 is repeated for each master
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Using the InfoCube query example in
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The first join predicate in Figure
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Thus, we have broken down the origi
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Figure 10-14 Comparing filtering Th
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AND "/BIC/AZOSASALE00"."PLANT" = "/
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Column Local or join CALMONTH Local
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10.4 Indexing of InfoCubes The defa
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11.1 Background To be more competit
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11.2.1 Hardware and software config
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11.2.2 Network infrastructure IBM S
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the chassis for blade-to-blade conn
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As part of the pre-benchmark planni
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11.4 Test case scenarios The goal o
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Figure 11-3 explains the data flow
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In addition, each cube, especially
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Measurement results Table 11-2 prov
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Figure 11-7 shows the average CPU u
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The number of queries per hour show
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Figure 11-10 shows that the average
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11.5.1 Recommendations for configur
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12.1 Terminology: BI objects and pr
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Metadata plays a fundamental role i
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12.3 Dataflow in SAP BI Data flow i
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12.4 Information access As previous
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Predecessor Successor WW Sales Euro
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An InfoCube in SAP BI can have up t
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Page 316 and 317: P table Master data table for time-
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Page 334 and 335: IT scenario The environment we used
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Page 340 and 341: List of SAP BW OSS Notes Table C-1
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Page 348 and 349: Table name Average row length Total
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Page 352 and 353: Parameters BPK16K0 BPK16K1 VIRTUAL
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Page 356 and 357: Example D-6 shows a cube index crea
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Page 370 and 371: C Candidates for partiioning Data W
Page 372 and 373: M master data 155, 211, 258, 277 si
Page 374 and 375: star schema 265-266 also see InfoCu
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