Check statistics in Infocube

Hi all,
When i go to Right click --> Manage button and then Performance tab of any infocube i get 3 areas for concern.
Check index which is Green for my infocubes.
Check aggr index is also Green for my infocubes.
Check Statistics --> This is where i am getting Yellow signal.
I just hope these statistics are different from what we generate from
DB13 as daily job.
I also tried to Create statistics with Create stats button and triggered
job BI_INDX_STATISTICS_BW successfully.
But even after finishing that job so many days , i am still getting
Yellow symbol for Check statistics button.
Please let me know what is exact procedure to generate stats for Infocube and when ???
Appreciate your quick replies.
Best Regards,
AjitR

Refreshing the stats should start a job.  Are you running it in background.  NO job running would really sem to be the problem to look into.   The job would refresh stats on the fact tables, the dimension tables and all the master data tables of characteristics in the cube.
RSRV should identify what tables are yellow.
Keep in mind, the Warning process used is nothing very sophisticated.  SAP simply checks the date statistics were last collected on a table and if it is over 30 days old, flags it with a warning, regardless of how accurate/inaccurate the stats actually are.  You very well may have tables that are being flagged because of the date last analyzed > 30, but if the table(s) being flagged really don't see have lots of records added, then the older stats are still perfectly fine.
The best method for handling DB statistics collection is to check with your DBA and make sure they are running BRCONNECT daily.  It can be conifigured to refresh stats based on some percentage of table activity, e.g. addition of more than 25% new rows since last time stats were refreshed causes new stats on that table to be collected.  If BRCONNECT is running regularly, then you don't need to worry about the yellow warnings - the tables that have regular activity will have stats updated by BRCONNECT, and tables that don't see much activity won't waste time rfreshing stats unnecessasarily.

Similar Messages

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    Hi,
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    Other terms
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    Hi,
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            Partitioned tables, except where partitioned tables are explicitly excluded by setting the active flag in the DBSTATC table to I. For more information, see SAP
            InfoCube tables for the SAP Business Information Warehouse (SAP BW)
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    For more information about how update statistics works, see Internal Rules for Update Statistics.
    You can influence how update statistics works by using the -force options. For more information, see -f stats.
    Unless you have special requirements, we recommend you to perform the standard update statistics, using one of the following tools to schedule it on a regular basis (for example, daily or weekly):
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             A tool such as cron (UNIX) or at (Windows NT) to execute the following standard call:
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            stats_exclude     
            stats_dbms_stats
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            brconnect -u / -c -f stats -t all -e info_cubes
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            stats_dbms_stats = INFO_CUBES:R:4
    brconnect -u / -c -f stats -t all, Statistics are checked for all tables and updated, if necessary. New statistics for InfoCube tables are created with the DBMS_STATS package using row sampling and an internal parallel degree of 4.
    This is the default. Statistics are checked for all tables and updated, if necessary. If InfoCube tables are present and selected following the update check, statistics are generated for them using histograms.
    You can update statistics on the Oracle database using the Computing Center Management System (CCMS).
    By running update statistics regularly, you make sure that the database statistics are up-to-date, so improving database performance. The Oracle cost-based optimizer (CBO) uses the statistics to optimize access paths when retrieving data for queries. If the statistics are out-of-date, the CBO might generate inappropriate access paths (such as using the wrong index), resulting in poor performance.
    The CBO is a standard part of the SAP system. If statistics are available for a table, the database system uses the cost-based optimizer. Otherwise, it uses the rule-based optimizer.
    You can also run update statistics for your Oracle database using BRCONNECT. Refer to Update Statistics with BRCONNECT. This is the recommended way to update statistics.
    Update statistics after installations and upgrades
    You need to update statistics for all tables in the SAP system after an installation or an upgrade. This is described in the relevant installation or upgrade documentation.
           1.      You use the DBA Planning Calendar in CCMS to schedule regular execution of check statistics and, if necessary, update statistics. For more information.
           2.      If required, you run one-off checks on tables to see if the table’s statistics are out-of-date, and then run an update statistics for the table if required. This is useful, for example, if the data in a table has been significantly updated, but the next scheduled run of update statistics is not for a long time.
    You can check, create, update, or delete statistics for:
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    ¡        Groups of tables
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    Do not add, delete, or change table entries unless you are aware of the consequences.
            Tables from the DBSTATC table with either of the following values:
             ACTIVE field U
             ACTIVE field R or N and USE field A(relevant for the application monitor)
          6.      BRCONNECT writes the results of update statistics to the DBSTATTORA table and also, for tables with the DBSTATC history flag or usage type A, to the DBSTATHORA table.
          7.      For tables with update statistics using methods EI, EX, CI, or CX, BRCONNECT validates the structure of all associated indexes and writes the results to the DBSTATIORA table and also, for tables with the DBSTATC history flag or usage type A, to the DBSTAIHORA table.
          8.      BRCONNECT immediately deletes the statistics that it created in this procedure for tables with the ACTIVE flag set to N or R in the DBSTATC table.

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    0BWTC_C02 is replaced by 3 cubes: 0TCT_MC01, 0TCT_MC02 and 0TCT_MC03
    (here each mulitprovider is based on 2 cubes, one basic cube and one virtual cube.
    For ex, 0TCT_MC01 has basic cube 0TCT_C01 and virtual cube 0TCT_VC01, the naming convention is same for rest 0TCT_C* and 0TCT_VC*)
    Hope the above is clear
    0BWTC_C03 was referring to RSDDSTAT table before, but this table has become obsolete in BI 7.0. Corrections have made to the extractor in BI 7.0 SAP_BW SP 9 such that the extractor refers to RSDDSTAT_OLAP. So you can use this cube as the way you were using in BW 3.x if you are above or equal to SP 9.
    0BWTC_C04 - no migration is required, technical content 3.x is still valid.
    0BWTC_C05 - is replaced by 0TCT_MC23 (0TCT_C23 and 0TCT_VC23)
    0BWTC_C09 - no migration is required, technical content 3.x is still valid.
    0BWTC_C11 - no migration is required, technical content 3.x is still valid.
    2) There is virtual provider for all the replaced cubes, but the old cubes for which migration is not required dont have virtual cubes.
    3) The new multiproviders have virtual cubes alreday.
    Hope this helps.
    Best Regards,
    Rajani

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