Checklist for Query Performance
1. If exclusions exist, make sure they exist in the global filter area. Try to remove exclusions by subtracting out inclusions.
2. Use Constant Selection to ignore filters in order to move more filters to the global filter area. (Use ABAPer to test and validate that this ensures better code)
3. Within structures, make sure the filter order exists with the highest level filter first.
4. Check code for all exit variables used in a report.
5. Move Time restrictions to a global filter whenever possible.
6. Within structures, use user exit variables to calculate things like QTD, YTD. This should generate better code than using overlapping restrictions to achieve the same thing. (Use ABAPer to test and validate that this ensures better code).
7. When queries are written on multiproviders, restrict to InfoProvider in global filter whenever possible. MultiProvider (MultiCube) queries require additional database table joins to read data compared to those queries against standard InfoCubes (InfoProviders), and you should therefore hardcode the infoprovider in the global filter whenever possible to eliminate this problem.
8. Move all global calculated and restricted key figures to local as to analyze any filters that can be removed and moved to the global definition in a query. Then you can change the calculated key figure and go back to utilizing the global calculated key figure if desired
9. If Alternative UOM solution is used, turn off query cache.
10. Set read mode of query based on static or dynamic. Reading data during navigation minimizes the impact on the R/3 database and application server resources because only data that the user requires will be retrieved. For queries involving large hierarchies with many nodes, it would be wise to select Read data during navigation and when expanding the hierarchy option to avoid reading data for the hierarchy nodes that are not expanded. Reserve the Read all data mode for special queries—for instance, when a majority of the users need a given query to slice and dice against all dimensions, or when the data is needed for data mining. This mode places heavy demand on database and memory resources and might impact other SAP BW processes and tasks.
11. Turn off formatting and results rows to minimize Frontend time whenever possible.
12. Check for nested hierarchies. Always a bad idea.
13. If “Display as hierarchy” is being used, look for other options to remove it to increase performance.
14. Use Constant Selection instead of SUMCT and SUMGT within formulas.
15. Do review of order of restrictions in formulas. Do as many restrictions as you can before calculations. Try to avoid calculations before restrictions.
16. Check Sequential vs Parallel read on Multiproviders.
17. Turn off warning messages on queries.
18. Check to see if performance improves by removing text display (Use ABAPer to test and validate that this ensures better code).
19. Check to see where currency conversions are happening if they are used.
20. Check aggregation and exception aggregation on calculated key figures. Before aggregation is generally slower and should not be used unless explicitly needed.
21. Avoid Cell Editor use if at all possible.
22. Make sure queries are regenerated in production using RSRT after changes to statistics, consistency changes, or aggregates.
23. Within the free characteristics, filter on the least granular objects first and make sure those come first in the order.
24. Leverage characteristics or navigational attributes rather than hierarchies. Using a hierarchy requires reading temporary hierarchy tables and creates additional overhead compared to characteristics and navigational attributes. Therefore, characteristics or navigational attributes result in significantly better query performance than hierarchies, especially as the size of the hierarchy (e.g., the number of nodes and levels) and the complexity of the selection criteria increase.
25. If hierarchies are used, minimize the number of nodes to include in the query results. Including all nodes in the query results (even the ones that are not needed or blank) slows down the query processing. The “not assigned” nodes in the hierarchy should be filtered out, and you should use a variable to reduce the number of hierarchy nodes selected.
Custome Infoobjects Tabels:
/BIC/M
/BIC/P
/BIC/Q
/BIC/X
/BIC/Y
/BIC/T
/BIC/H
/BIC/K
Standard Infoobjects Tabels(Buss. Content):
Replace "C" with "0" in above tables.
Ex: /BI0/M
Standard InfoCUBE Tables :
/BI0/
/BI0/
/BI0/
/BI0/
/BI0/
/BI0/
BW Tables:
BTCEVTJOB -- To check List of jobs waiting for events
ROOSOURCE -- Control parameters for Datasource
ROOSFIELD -- Control parameters for Datasource
ROOSPRMSC -- Control parameters for Datasource
ROOSPRMSF -- Control parameters for Datasource
-- More info @ ROOSOURCE weblog
RSOLTPSOURCE -- Replicate Table for OLTP source in BW
RSDMDELTA -- Datamart Delta Management
RSSDLINITSEL, RSSDLINITDEL
-- Last valid Initialization to an OLTP Source
RSUPDINFO -- Infocube to Infosource correlation
RSUPDDAT -- Update rules key figures
RSUPDENQ -- Removal of locks in the update rules
RSUPDFORM -- BW: Update Rules - Formulas - Checking Table
RSUPDINFO -- Update info (status and program)
RSUPDKEY -- Update rule: Key per key figure
RSUPDROUT -- Update rules - ABAP routine - check table
RSUPDSIMULD -- Table for saving simulation data update
RSUPDSIMULH -- Table for saving simulation data header information
RSDCUBEIOBJ -- Infoobjects per Infocube
RSIS -- Infosouce Info
RSUPDINFO -- Update Rules Info
RSTS -- Transfer Rules Info
RSKSFIELD -- Communication Structure fields
RSALLOWEDCHAR -- Special Characters Table(T Code : RSKC, To maintain)
RSDLPSEL -- Selection Table for fields scheduler(Infpak's)
RSDLPIO -- Log data packet no
RSMONICTAB -- Monitor, Data Targets(Infocube/ODS) Table, request related info
RSTSODS -- Operational data store for Transfer structure
RSZELTDIR -- Query Elements
RSZGLOBV -- BEx Variables
RXSELTXREF, RSCOMPDIR -- Reports/query relavent tables
RSCUSTV -- Query settings
RSDIOBJ -- Infoobjects
RSLDPSEL -- Selection table for fields scheduler(Info pak list)
RSMONIPTAB -- InfoPackage for the monitor
RSRWORKBOOK -- Workbooks & related query genunid's
RSRREPDIR -- Contains Genuin id, Rep Name, author, etc...
RSRINDEXT -- Workbook ID & Name
RSREQDONE -- Monitor: Saving of the QM entries
RSSELDONE -- Monitor : Selection for exected requests
RSLDTDONE -- Texts on the requeasted infopacks & groups
RSUICDONE -- BIW: Selection table for user-selection update Infocubes's
RSSDBATCH -- Table for Batch run scheduler
RSLDPDEL -- Selection table for deleting with full update scheduler
RSADMINSV -- RS Administration
RSSDLINIT -- Last Valid Initializations to an OLTP Source
BTCEVTJOB --To check event status(scheduled or not)
VARI -- ABAP Variant related Table
VARIDESC -- Selection Variants: Description
SMQ1 -- QRFC Monitor(Out Bound)
SM13 -- Update Records status
T Code : LBWQ --> QRFC related Tables
TRFCQOUT,
QREFTID,
ARFCSDATA
More info @ Note 728687 - Delta queued: No data in RSA7
