RSRT - Aggregates

Dear Experts,
A report was taking more time for execution.
I have used RSRT transaction with "Aggregates" option.
It displayed few coloumns in Red.
What does that mean.
As per my understanding, those calculations are taking more time to get executed.
So I have created Aggregates with 'propose by system" option.
My issue was solved.
I need clarification on ...
1. What does the Red coloumns mean, why are the characteristics not displayed in Red.
2. How to know whether aggregates are necessary for the report ?
.3. What is the correct procedure to know this ?
Kindly clarify.
Regards
Sridhar

Hi,
1. What does the Red coloumns mean, why are the characteristics not displayed in Red.
Only Key figures are aggregated based on characteristic, hence only columns in red. Charachteristics cannot be aggregated.
2. How to know whether aggregates are necessary for the report ?
.3. What is the correct procedure to know this ?
To get an answer to above , check the link below:
http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/cbd2d390-0201-0010-8eab-a8a9269a23c2?quicklink=index&overridelayout=true
-Vikram

Similar Messages

Rsrt aggregate recommendations

How can I use rsrt to get aggregate recommendations? I am running a query and it takes too long to run. I want to see if rsrt can give me any recommendations but I am not sure how.

Hi Uday.
When you execute the query from RSRT choose "Execute + Debug" and select "Display aggregates found". This will give you a list of the used infoobjects, hierarchies etc. that were used at query execution. However in the aggregate maintanence you can generate an aggregate based on a query which will propose an aggregate with the same characteristics and hierarchies. Just choose "Propose" -> "Propose from query".
Another idea could be to check why and where the query is taking so long? DB, frontend etc. You can check this from transaction ST03 (or the RSDDSTAT table) -> Expert mode -> BW system load -> Today -> Switch the aggregation to query instead of cube.
Hope it helps.
BR
Stefan

Splits for aggregates in rsrt

When I go to RSRT and execute+debug my query, with aggregates selected, it shows splits like split1, split2 etc. What does the split mean?

Each split is like a small sub-query telling you the parameters used in that particular part of the query. Depending on how your aggregates are set up then one aggregate may be sufficient for a number of 'splits'.
If you have 'Fixed' parameters on then you may find an aggregate is sufficient for most splits but if you have values hard coded then the aggregate is less likely to be useful for many splits.
You need to find a balance between putting in place appropriate aggregates, without building aggregates that are so big they become almost useless.
The number of splits you see in RSRT is determined by your query definition, not by your aggregates.
Hope I have understood your question
Dave

Questions regarding aggregates on cubes

Can someone please answer the following questions.
1. How do I check whether someone is re-bilding aggregates on a cube?
2. Does rebuilding an aggregate refer to the rollup process? Can it take a few hours?
3. What does it mean when someone switches off an aggregate, basically what is the difference (conceptually/time consumption)between:
                        A. activating an aggregate?
                        B. switching off/on an aggregate?
                        C. rebuilding an aggregate?
3. When a user complains that a query is running slow, do we build an aggregate based on the chars in rows & free chars in that query OR is there anything else we need to include?
4. Does database statistics in the 'MANAGE' tab of a cube only show statistics or does it do anything to improve the load/query performance on the cube?
Regards,
Srinivas.

1. How do I check whether someone is re-bilding aggregates on a cube?
If your aggregate status is in red and you are filling up the aggregate - it is an initial fill of the aggregate and filling up would mean loading the data from the cube into the aggregate in full.
2. Does rebuilding an aggregate refer to the rollup process? Can it take a few hours?
Rebuilding of an aggregate is to reload the data into the aggregate from the cube once again.
3. What does it mean when someone switches off an aggregate, basically what is the difference (conceptually/time consumption)between:
A. activating an aggregate?
this would mean recreating the data structures for the aggregate - this would mean dropping the data and reloading the data.
B. switching off/on an aggregate?
Switching off an aggregate means that it will not be used by the OLAp processor but would mean that the aggregate still gets rolled up. Rollup referring to loading changed data from the cube into the aggregate - this is done based n the requests that have not yet been rolled up into the cube.
C. rebuilding an aggregate?
Reloading data into the aggregate
3. When a user complains that a query is running slow, do we build an aggregate based on the chars in rows & free chars in that query OR is there anything else we need to include?
Run the query in RSRT and do an SQl view of the query and check the characteristics that are used in the query and then include the same into your aggregate.
4. Does database statistics in the 'MANAGE' tab of a cube only show statistics or does it do anything to improve the load/query performance on the cube?
Stats being updated will improve the execution plans on the database. Making sure that stats are up to date would lead to better execution plans and hence possibly better performance but it cannot eb taken for granted that refreshing stats is going to improve query performance.

Aggregate build suggestions

Hello Experts,
We are trying to do performance tuning on a BW3.5 setup ... Currently, we are focusing on queries and looking at the feasibility of building aggregates for performance improvement. We find that most queries see data at the very granular level as follows:
Rows
Profit centre group -> Profit Centre-> Product hierarchy level 1
Columns
Actual , Planed, difference.
Now the proposal generated for the queries do not give profit centre group but only profit centre in the first dimension. Please note that profit centre group is a navigational attribute of profit centre( There is a message that says profit centre cannot be in aggregate because of presence of profit centre group)
Now my question is , in order for these queries to hit the aggregate, should I introduce both Profit centre group and Profit centre in the aggregate? In doing so, will I risk creating a bigger aggregate?
I am not sure if I am making sense. But please feel free to ask questions I will explain more if needed. My question to be precise is, whether all the characteristics required to view the data in a query needs to be present in the aggregate?
Many thanks in advance for all your inputs..
Regards,
Solomon

Hi Solomon,
If your query has to hit the aggregate, then all the characteristics in the selection, filter, default values, rows, columns, used in RKFs, used in exceptional aggregation should be present in the aggregate.
You can execute the query in RSRT ->Execute+Debug-> with Display aggregate found option.
This will tell you exactly what are the characteristics those should be present so that your default view hits the aggregate.
Needless to say, if you are planning to drilldown the report with any characteristic from the free characteristics, even that should be present in the aggregate.
Now coming to your confusion on Profit centre and Profit Centre Group, Since profit centre group is already navigational attribute of profit centre you need not ( can not ) place that in the aggregate, when profit centre is already present.
However, if the query is executed with this nav attribute, it will certainly hit the aggregate ( Can be checked in RSRT ).
Thanks,
Krishnan

Report using aggregates or not

Dear All,
how to identilfy my report is using aggregates or directly getting data from cube .
regards,
Anil

Hi,
Go to rsrt>execute and debug>check display statistics data>execute query>go back.
In infoprovider shows a number, it means it hits the aggregate.
You can also chheck this in table RSDDSTAT_DM.
-Mayuri

Transaction RSRT and agregattes.

When I execute transaction RSRT, To execute + Debuging, I select to show aggregates, the process generates dump with the following legend:
If the error occures in a non-modified SAP program, you may be able to
find an interim solution in an SAP Note.
If you have access to SAP Notes, carry out a search with the following
keywords:
"RAISE_EXCEPTION" " "
"SAPLRRSV" or "LRRSVF03"
"RAISE"
or
"SAPLRRSV" "IOBJ_VALUE_NOT_VALID"
or
"WRITEQUERY " "IOBJ_VALUE_NOT_VALID"
Query is on multiprovider.
Thanks for yuor help.

Hi,
Please check the OSS Note:
877308
-Vikram

How to create suitable aggregates for queries on multiprovider ?

hi all,
goal reduce db time of query and improve performance
i have queries on a multicube. I have 5 cubes under the multiprovider. I having performance issue with one of the cubes. it had
high slection/transfer ratio. The same cube had high 94% DB TIme. All the BW and DB indexes and stats are green. I chose
the path of aggregates. when i tried suggest from proposal it is giving me query time and date range and i gave last
3 days and query time 150 sec. it is suggesting huge number of aggregates like 150 of them and not getting reduced much
when i tried optimize funcitonality.
The faulty cube had nearly 9 million records and 4 years of data
1. generally how many aggregates do we need to create on a cube?
2. how do i use propose from last navigation? it is not creating any aggregates
3. is there a way for system to propose less number of aggregates?
4. if nothing works i want to cut the volume of the aggregates base on years or quarters. how do i do that?
i created with time charactersitic 0calquarter and dragged in ocal day and 0calmonth. activated and filled in ..but
query is not hitting it when i do a monthly selection. i tried bringing in all the other dimensions...except line item
dimenisons....no use ...it is not hitting the manual aggregates in RSRT.the slection on 0calquarter is * .
5. should i change it to fixed value and bring in the line items too and create it?
6. I wanted to try propose aggregate from query option..but my query is on multiprovider...and not able to copy it to cube..
plz help me how to find the suitable aggregates for query on multiprovider
7. should i create any new indexes on the cube using the chractrestics in the where condiotion of select statment...but in
that case, select statement changes with drill down.......how do i handle it ?
8. how will i make sure the aggregates work for all queries run time imporvement?
9. plz suggest other approaches if any with procedures
this is a urgent problem plz help...
<b>thanks in advance
points will be assigned for inputs</b>

1. generally how many aggregates do we need to create on a cube?
it depends on your specific needs, you can need none or several.
2. how do i use propose from last navigation? it is not creating any aggregates
Can you elaborate?
3. is there a way for system to propose less number of aggregates?
In any of the menus of screen for creating aggregates you have an option for sytem propose aggregates for one specific queries i am not sure it worked with multicubes.
4. if nothing works i want to cut the volume of the aggregates base on years or quarters. how do i do that?
You should delete 0calday from aggregates in order to accumulate data for any greater time unit. Other solution for times is to study try to do a partition in cube.
5. should i change it to fixed value and bring in the line items too and create it?
Can you elaborate?
6. I wanted to try propose aggregate from query option..but my query is on multiprovider...and not able to copy it to cube..
Answered before, maybe you can create a query only with data on that cube that appears in multicube query in order to proposal any aggregate in thath cube.
7. should i create any new indexes on the cube using the chractrestics in the where condiotion of select statment...but in
that case, select statement changes with drill down.......how do i handle it ?
is not recomendable create new indexes in multidemensional structures. Try avoid selections for navigational attributes, if necesary add navigate attributte as dimension attributes, put filters in filter section in BEX.
8. how will i make sure the aggregates work for all queries run time imporvement?
try transaction st03
9. plz suggest other approaches if any with procedures
Some other approches yet answering
Good luck

Questions on cache and general RSRT settings for plancube

Hi,
we would like to:
1) set request status 1 in RSRT for our planqueries, in order to automatically refresh the query after executing a planfunction (problem we have now is that the results of a planfunction are not automatically updated in the query. Only when doing something else like executing other function, saving, check locks, ... the results are visible).
2) activate delta cache for our planqueries
we have read OSS note 1136163 on RSRT settings. It says:
Aggregation level "A" is implemented internally by the automatically created query "P/!!1P" (plan buffer query). This query acts like an InfoProvider. It reads the data of the database or provides the data from InfoProvider "P", it adds the data of the delta buffer "Dp" (or the delta buffer Dpi if P is a MultiProvider with several PartProviders Pi that can be planned) and transfers the data manager as data of the InfoProvider "A" of type "ALVL". The query "P/!!1P" can use aggregates and the cache; this is exactly like each normal query in "P". If "P" is a MultiProvider, it is useful to set PARTITIONMODE to "1".
              For the query "P/!!1P" that is created automatically for an aggregation level or for all aggregation levels using the InfoProvider P, we recommend the following setting:
              Read mode "H", request status "1", cache mode "1" or higher, delta cache "true" and SP grouping "1".
              Furthermore, the selection to use the structure element (KIDSEL) should be "true".
              The input-ready queries in "A" should not, and cannot, use a cache. The request status is irrelevant since queries in "A" are automatically set to current data. The delta buffer does not currently support hierarchy processing. Therefore, aggregation level "A" cannot completely support read mode "H". For input-ready queries at A:
              Read mode "X", request status "0", cache mode "0".
             The delta cache and SP grouping are not visible
Problems we have:
1) for query P/!!1P (PCA_AGQF/!!1PCA_AGQF in our example) does not allow changing the request status (greyed out). It now has value 0 instead of 1. It also does not allow to activate the delta cache flag. How to change this? In RSDIPROP we have set partitionmode to 1 for the multiprovider and activated the delta cache flag...
2) can we use the cache / delta cache principle for our planqueries? If so, how to ensure these settings remain activated in RSRT?
regards
Dries
regards
dries

Hi,
To change the cache settings for your cube.
Open the cube in RSA1 and click in 'Chance'.
- click in the 'Environment' menu;
- expand 'InfoProvider Properties'
- select the option 'Change'.
You will be able to set the cache mode for this provider.
I don't think it will be possible use cache for a multiprovider, it is
not possible.
Regards,
Amit

Query to read more than one aggregate at same time - is it possible?

Hi,
We have 2 aggregates set up. One contains data for 2007, the other for 2006. These are restricted by setting fixed values for 0CALYEAR.
When running a query for a single year the correct aggregate is picked up depending on which year is input.
When running the query for a range which spans both years then no aggreagate is picked up and the cube is then read.
Is there a system setting somewhere (RSADMIN table possibly?) which allows for multiple aggregates to be used when query is executed?
Your help would be greatly appreciated.
Thanks,
Steve

Hi Rodolphe,
Thanks for the answer.
Unfortunately we have too many queries against the cube in question to have to create and utilise restricted key figures per year.
I'm looking for a quick fix solution here if it exists - i.e. a parameter setting possibly.
I of course always use RSRT when testing the use of aggregates.
When I enter the range of years I get the following message:
Not possible because -
'____Characteristic/attribute 0CALYEAR does not have aggregation level */%'
This is displayed against both the aggregates for 2006 and 2007.
When using only one year then it correctly finds the aggregate for that year.
Thanks,
Steve

Performance ISSUE related to AGGREGATE

hi Gem's can anybody give the list of issue which we can face related to AGGREGATE maintananece in support project.
Its very urgent .plz.........respond to my issue.its a urgent request.
any link any thing plz send me
my mail id is
[email protected]

Hi,
Try this.
"---" sign is the valuation of the aggregate. You can say -3 is the valuation of the aggregate design and usage. ++ means that its compression is good and access is also more (in effect, performance is good). If you check its compression ratio, it must be good. -- means the compression ratio is not so good and access is also not so good (performance is not so good).The more is the positives...more is useful the aggregate and more it satisfies the number of queries. The greater the number of minus signs, the worse the evaluation of the aggregate. The larger the number of plus signs, the better the evaluation of the aggregate.
if "-----" then it means it just an overhead. Aggregate can potentially be deleted and "+++++" means Aggregate is potentially very useful.
Refer.
http://help.sap.com/saphelp_nw70/helpdata/en/b8/23813b310c4a0ee10000000a114084/content.htm
http://help.sap.com/saphelp_nw70/helpdata/en/60/f0fb411e255f24e10000000a1550b0/frameset.htm
Run your query in RSRT and run the query in the debug mode. Select "Display Aggregates Found" and "Do not use cache" in the debug mode. This will tell you if it hit any aggregates while running. If it does not show any aggregates, you might want to redesign your aggregates for the query.
use tool RSDDK_CHECK_AGGREGATE in se38 to check for the corrupt aggregates
If aggregates contain incorrect data, you must regenerate them.
Note 646402 - Programs for checking aggregates (as of BW 3.0B SP15)
Check SE11 > table RSDDAGGRDIR . You can find the last callup in the table.
Generate Report in RSRT
http://help.sap.com/saphelp_nw04/helpdata/en/74/e8caaea70d7a41b03dc82637ae0fa5/frameset.htm
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/cccad390-0201-0010-5093-fd9ec8157802
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/4c0ab590-0201-0010-bd9a-8332d8b4f09c
/people/juergen.noe/blog/2007/12/13/overview-important-bi-performance-transactions
/people/prakash.darji/blog/2006/01/26/query-optimization
Cube Performance
/thread/785462 [original link is broken]
Thanks,
JituK

How query read aggregate???

Experts !
I have problem with my aggregate design.
i have created one aggregate on one of my cube. when i try to check using rsrt in debug mode, looks like that query is not hitting the aggregate which i have just created. it goes to another aggregate.
Now, does it mean that query will always go to the same aggregate ? or when users pulls different characteristics from free charastericts , my query might jump to another aggregates ??
OR, At the beginig whatever aggregate it hits, the query will only stick to that !
hows the process works ?
thanks

When youu2019re not sure how to design a good aggregate. Let the system propose for you but you have to use the cube in question for some time. The reason is the system need to gather statistics, before it can propose a good one for you.
Designing an aggregate (drag and drop) is easy, but designing a good one is not as easy as it looks. It requires some skills. But the good news is that skills can be learned.
When you execute a query, OLAP Processor will look for data (based on the criteria) in the following order.
Local OLAP Cache
Global OLAP Cache
Aggregate
Cube
The goal is the OLAP Processor should hit either of the first 3 guys, then bingo ! good hit. But if all of them are missed , it has to go to the cube to fetch the data. Then it defeats the purpose of aggregate.
Remember the main purpose of aggregate is speeding up data retrieval. But there is associated overhead. You should check the rating and delete bad aggregates.
Cheers.
Jen

How can i choose charecteristics while building aggregates on zsd-c03

Hi Experts,
I would like to build aggregates on my sales infocube. In this infocube having 6 dimensions,
When we are building aggregates on characteristics how would i know on which characteristics want to choose for aggregates is there any t.code to measure size of the dimension.
Can you please share you valuable ideas.
Regards
Siri

Hi
Genrally when we create aggregates ,we will follow some guidelines.
1.If aggregation is more than 10
2.If DB ratio is morethan 30.
We can check these in the following t_codes
ST03,RSDDSTAT& RSRT
When we create aggregates,u will get popup whether to create urself or system proposals.U can get info from system proposals also.
Assign points if useful.
Regards,
Hari

How to decide that an aggregate is required?

I am currently using an infocube for reporting, I have seen that system has suggested an aggregate for that infocube, I want to know the scnarioes based on which, I can decide that my infocube actually needs the aggregate? Is there any thing I can check at the time/after query exection which I can take as performance measure of my query?
Edited by: SAP_Vivek_1986 on Dec 12, 2009 2:42 PM

HEllo,
When the query is executed, it is clear to the user whether data is being read from an aggregate, a BI accelerator index, or an InfoCube.
In the maintenance transaction, you can deactivate one or more aggregates on a temporary basis to test them for performance purposes or to analyze data consistency.
You can also execute the relevant query in the query monitor (transaction RSRT) using a corresponding debug option: Choose This graphic is explained in the accompanying text Execute + Debug. In the Debug Options dialog box, choose Do Not Use Aggregates to execute the query with an InfoCube...
Check this URl: http://www.scribd.com/doc/7477854/SAP-BW-Query-Performance-Tuning-With-Aggregates
Regards,
Sivaram
Edited by: sivarambi on Dec 12, 2009 3:03 PM

Line Item 0BATCH is used In Aggregate

Dear Masters
I have used aggregate on cube. When I excuting query in query designer, it's taking much time to display the data. When I checked aggregate, it's giving warning message below
Line item 'Batch number' is used in aggregate
System Response
If you are dealing with a line item that has many characteristic values, the aggregate can become as large as the InfoCube. This means that there is probably no advantage in having an aggregate in this case.
This message does not appear in the expert mode.
Procedure
Check the number of characteristic values in the line item and delete the line item from the aggregate, if including it means that the aggregate is too large.
What I want to do to avoid above warning message.
Do I want to uncheck checkbox of line item for 0batch or delete the that field from aggregate
Thanks in advance
Raja.S

hi raja,
u can remove the line item from aggregates dimension.
allow the system to propese an aggregate from the quey otherwise.
prerequisite for a system to propose a aggregate is the cube should have atleast one query on it.
check out the performance in RSRT and RSRCACHE .
RSRT with aggregates compare the time of execution and consider deleting the aggregates.
bye
reward points if helpful.

RSRT - Aggregates

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