Aggregates in Changerun

Why are aggregates captured during Change run???

Hello,
Not all aggregates are included in the Change run, if the aggregate includes any of the master data attribute then only the respective aggregate is included in the change run.
Hope this helps.
Bala

Similar Messages

Aggregate DB index problems in Attribute changerun

Dear All,
The attribute changerun in Process chain is hanging regularly and if I check the SM50 process overview
I am able to see the SQL statement " CREATE BITMAP INDEX "SAPR3"."/BIC/F200378~080"
ON "/BIC/F200378" ( "KEY_1003788" ) PCTFREE 10" which is running in loops for hours.
We tried the SAP Note 728922 but only few days it worked and remaining days till we deactivate the aggregates the Attribute changerun will be hanging.
We can't afford deactivating and refilling of the aggregates as we have 7years of data
kindly suggest me how to Avoid this.
Regards,
Ugendhar

Dear Ajeet ,
The issue is coming most of the times with two aggregates which have just 2117144 and 4022462 records respectively.
I will try creating the copy of the aggregates yearwise but this may hinder the performance of the query when we view for several years as it may have to split across many aggregates.
Dear Krishna,
The problem is not with the Cube indexes and facing the issue in ACR which is not related to cube but the aggregates of it.
Thanks for ur suggestions and please guide with more inputs if possible.
Regards,
Ugendhar

How to create Process chain for Aggregate for Master data

Hello friends,
I created Aggregates on Navigational Attributes.
Now they are working fine, but i need to know that how shall i create the Roll up for Aggregates on Navigational Attributes.
The point is the master data changes frequently a lot of time for e.g. for 0customer etc.....
So if any one can send me the step by step documents so as to know how to roll up the Aggregates for Navigation attributes or for aggregates created on Master data....
How to create process chains for the same ?????????
Because if master data changes, then rolling up the aggregates straight forward will not help.
So we need to write a process chain so that it deactivates the aggregate and reactivate again and fill up again..........
If i mis interpreted something please rectify it.......
Please advise

Hello,
the changerun that you have to schedule in order to activate the master data will adjust the aggregates automatically. There is no need to deactivate them after master data loads.
Best regards,
Ralf

UNCAUGHT_EXCEPTION in Aggregate activation

Hi,
We are activating and filling up the aggregate and we got the following error message:
ABAP/4 processor: UNCAUGHT_EXCEPTION
I checked the dump and the meeage is:
Runtime Errors         UNCAUGHT_EXCEPTION
Exceptn                CX_RSR_X_MESSAGE
ShrtText
An exception that could not be caught occurred.
What happened?
The exception 'CX_RSR_X_MESSAGE' was raised but was not caught at any stage in the call hierarchy.
Since exceptions represent error situations, and since the system could not react adequately to this error, the current program, 'SAPLRRMS', had to be terminated.
Any help would be greatly appreciated.
Regards
Nagendra

Hi,
It is a common memory error. fill the aggregates one at a time.
Also check the system load in SM37, when there are lot of processes running
in the system, trigger after some time when system load is less.
Check whether any dependent rollup or changerun is runnning before refilling.
If there are any running, refill after that.
there may be locks in the system, check for db locks and user locks.
****Don't cancel the job....inconsistency may occur for data.
Warm Regards,
Vijay

Error while filling aggregates 'SQL Error: 12801'

Hello friends,
While filling aggregates for cube 0SD_C03 i am getting sql error 12801 and error SQL Error: ORA-12801: error signaled in parallel query server P029 ORA-00018: maxim .
Please suggest me a solution .
Regards
Nilesh Vakil

Hi Nilesh,
check:
Aggregate issue
Problems with BITMAPINDEX under ORACLE in BW
SAP Note Number: [159779|https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/oss_notes/sdn_oss_bw_sys/~form/handler]
No 'Star Transformation' for a Hierarchy Changerun
SAP Note Number: [934281|https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/oss_notes/sdn_oss_bw_bex/~form/handler]
Regards
Andreas

Maintain Aggregates-SQL Error

Hi All,
We are trying to create aggregates on a SALES overview cube 0SD_C03 on 0MATERIAL .We have some 100 million records in the cube. But it fails with an SQL Error.
SQL Error: Arithmetic overflow error converting expression to data type int.
Please advice.
Thanks,
Mayuri

Hi Nilesh,
check:
Aggregate issue
Problems with BITMAPINDEX under ORACLE in BW
SAP Note Number: [159779|https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/oss_notes/sdn_oss_bw_sys/~form/handler]
No 'Star Transformation' for a Hierarchy Changerun
SAP Note Number: [934281|https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/oss_notes/sdn_oss_bw_bex/~form/handler]
Regards
Andreas

Aborted changerun blocks objects

Hi all,
The changerun job on our Development system was started last evening and aborted. Now when I try to delete the contents of a InfoCube with aggregates, I receive this error:
"Aborted changerun blocks InfoCube ZSD_C03".
I have tried to deactivate the aggregates, hoping the changerun would then "release" it, but this does not work.
I also don't see any tables/objects blocked in SM12 and no process is active in SM50.
Does anyone know how to resolve this??
Kind regards,
Hans de Klein

Thanks Aneesh,
On DB-level there were no processes active. Indeed the X in table RSDDAGGRMODSTATE was missing. After changing the record, it was unlocked.
10 points heading your way
Kind regards,
Hans

Index's on cubes or Aggregates on infoobjects

Hello,
Please tell me if it is possible to put index's on cubes; are they automatically added or is this something I put on them?
I do not understand index's are they like aggregates?
Need to find info that explains this.
Thanks for the hlep.
Newbie

Indexes are quite different from aggregates.
An Aggregate is a slice of a cube which helps the data retrival on a faster note when a query is executed on a cube. Basically it is kind of a snapshot of KPI's and Business Indicators (Chars) which will be displayed as the initial query run result.
Index is a process which is inturn will reduce the query response time. While an object gets activated, the system automatically create primary indexes. Optionaly, you can create additional index called secondary indexes.Before loading data, it is advisable to delete the indexes and insert them back after the loading.
Indexes act like pointers for quickly geting the Data.When u delete it will delete indexes and when u create it will create the indexes.
When loading we delete Bcs during loading it has to look for existing Indexes and try to update so it will effect the Data load performence so we delete and create it will take less time when compared to updating the existing ones.
There is one more issue we have to take care if u r having more than 50 million records this is not a good practice insteah we can delete and create during week end when they r no users.

How can I see the data in the aggregates

how can see the data available in the aggregates.
Jay

Hi Jay,
its so simple,
please goto the manage aggregates screen and copy the technical name of the aggregate and add
/bic/exxx xxx is the aggregate technical name, and for f fat table use /bic/fxxx, and go to se16 and enter the table name and thats it ur data is with u.
R

Aggregates, VLAN's, Jumbo-Frames and cluster interconnect opinions

Hi All,
I'm reviewing my options for a new cluster configuration and would like the opinions of people with more expertise than myself out there.
What I have in mind as follows:
2 x X4170 servers with 8 x NIC's in each.
On each 4170 I was going to configure 2 aggregates with 3 nics in each aggregate as follows
igb0 device in aggr1
igb1 device in aggr1
igb2 device in aggr1
igb3 stand-alone device for iSCSI network
e1000g0 device in aggr2
e1000g1 device in aggr2
e1000g2 device in aggr3
e1000g3 stand-alone device of iSCSI network
Now, on top of these aggregates, I was planning on creating VLAN interfaces which will allow me to connect to our two "public" network segments and for the cluster heartbeat network.
I was then going to configure the vlan's in an IPMP group for failover. I know there are some questions around that configuration in the sense that IPMP will not detect a nic failure if a NIC goes offline in the aggregate, but I could monitor that in a different manner.
At this point, my questions are:
[1] Are vlan's, on top of aggregates, supported withing Solaris Cluster? I've not seen anything in the documentation to mention that it is, or is not for that matter. I see that vlan's are supported, inluding support for cluster interconnects over vlan's.
Now with the standalone interface I want to enable jumbo frames, but I've noticed that the igb.conf file has a global setting for all nic ports, whereas I can enable it for a single nic port in the e1000g.conf kernel driver. My questions are as follows:
[2] What is the general feeling with mixing mtu sizes on the same lan/vlan? Ive seen some comments that this is not a good idea, and some say that it doesnt cause a problem.
[3] If the underlying nic, igb0-2 (aggr1) for example, has 9k mtu enabled, I can force the mtu size (1500) for "normal" networks on the vlan interfaces pointing to my "public" network and cluster interconnect vlan. Does anyone have experience of this causing any issues?
Thanks in advance for all comments/suggestions.

For 1) the question is really "Do I need to enable Jumbo Frames if I don't want to use them (neither public nore private network)" - the answer is no.
For 2) each cluster needs to have its own seperate set of VLANs.
Greets
Thorsten

Aggregates on Non-cumulative InfoCubes, stock key figures, stock, stocks,

Hi..Guru's
Please let me know if anybody has created aggregates on Non-Cumulative Cubes or key figure (i.e. 0IC_C03 Inventory Management.)
I am facing the problem of performance related at the time of execution of query in 0IC_C03.( runtime dump )
I have tried lot on to create aggregate by using proposal from query and other options. But its not working or using that aggr by query.
Can somebody tell me about any sample aggr. which they are using on 0ic_c03.
Or any tool to get better performance to execute query of the said cube.
One more clarification req that what is Move the Marker pointer for stock calculation. I have compressed only two inital data loading req. should I compress the all req in cube (Regularly)
If so there would be any option to get req compress automatically after successfully load in data target.
We are using all three data sources 2lis_03_bx,bf & um for the same.
Regards,
Navin

Hi,
Definately the compression has lot of effect on the quey execution time for Inventory cubes <b>than</b> other cumulated cubes.
So Do compression reqularly, once you feel that the deletion of request is not needed any more.
And ,If the query do not has calday characterstic and need only month characterstic ,use Snap shot Info cube(which is mentioned and procedure is given in How to paper) and divert the month wise(and higher granularity on time characterstic ,like quarter & year) queries to this cube.
And, the percentage of improvement in qury execution time in case of aggregates is less for non cumulated cubes when compared to other normal(cumulated) cubes. But still there is improvement in using aggregates.
With rgds,
Anil Kumar Sharma .P
Message was edited by: Anil Kumar Sharma

Re: How to Improve the performance on Rollup of Aggregates for PCA Infocube

Hi BW Guru's,
I have unresolved issue and our team is still working on it.
I have already posted several questions on this but not clear on how to reduce the time on Rollup of Aggregates process.
I have requested for OSS note and searching myself but still could not found.
Finally i have executed one of the cube in RSRV with the database selection
"Database indexes of an InfoCube and its aggregates" and got warning messages i was tried to correct the error and executed once again but still i found warning message. and the error message are as follows: (this is only for one info cube we got 6 info cubes i am executing one by one).
ORACLE: Index /BI0/IACCOUNT~0 has possibly degenerated
ORACLE: Index /BI0/IPROFIT_CTR~0 has possibly degenerated
ORACLE: Index /BI0/SREQUID~0 has possibly degenerated
ORACLE: Index /BIC/D1001072~010 has possibly degenerated
ORACLE: Index /BIC/D1001132~010 has possibly degenerated
ORACLE: Index /BIC/D1001212~010 has possibly degenerated
ORACLE: Index /BIC/DGPCOGC062~01 has possibly degenerated
ORACLE: Index /BIC/IGGRA_CODE~0 has possibly degenerated
ORACLE: Index /BIC/QGMAPGP1~0 has possibly degenerated
ORACLE: Index /BIC/QGMAPPC2~0 has possibly degenerated
ORACLE: Index /BIC/SGMAPGP1~0 has possibly degenerated
i don't know how to move further on this can any one tell me how to tackle this problem to increase the performance on Rollup of Aggregates (PCA Info cubes).
every time i use to create index and statistics regularly to improve the performance it will work for couple of days and again the performance of the rollup of aggregates come down gradually.
Thanks and Regards,
Venkat

hi,
check in a sql client the sql created by Bi and the query that you use directy from your physical layer...
The time between these 2 must be 2-3 seconds,otherwise you have problems.(these seconds are for scripts that needed by Bi)
If you use "like" in your sql then forget indexes....
For more informations about indexes check google or your Dba .
Last, i mentioned that materialize view is not perfect,it help a lot..so why not try to split it to smaller ones....
ex...
logiacal dimensions
year-half-day
company-department
fact
quantity
instead of making one...make 3,
year - department - quantity
half - department - quantity
day - department - quantity
and add them as datasource and assign them the appropriate logical level at bussiness layer in administrator...
Do you use partioning functionality???
i hope i helped....
http://greekoraclebi.blogspot.com/
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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.

Back end activities for Activation & Deactivation of Aggregates

Hi ,
Could any body help me to understand the back-end activites performed at the time of activation and deactivation of aggregates.
Is filling of Agreegate is same as Roll up?
What is the diffrence between de-activation and deletion of Aggregate?
Thanks.
Santanu

Hi Bose,
Activation:
In order to use an aggregate in the first place, it must be defined activated and filled.When you activate it, the required tables are created in the database from theaggregate definition. Technically speaking, an aggregate is actually a separate BasicCube with its own fact table and dimension tables. Dimension tables that agree with the InfoCube are used together. Upon creation, every aggregate is given a six-digit number that starts with the figure1. The table names that make up the logical object that is the aggregate are then derived in a similar manner, as are the table names of an InfoCube. For example, if the aggregate has the technical name 100001, the fact tables are called: /BIC/E100001 and /BIC/F100001. Its dimensions, which are not the same as those in the InfoCube,have the table names /BIC/D100001P, /BIC/D100001T and so on.
Rollup:
New data packets / requests that are loaded into the InfoCube cannot be used at first for reporting if there are aggregates that are already filled. The new packets must first be written to the aggregates by a so-called “roll-up”. In other words, data that has been recently loaded into an InfoCube is not visible for reporting, from the InfoCube or aggregates, until an aggregate roll-up takes place. During this process you can continue to report using the data that existed prior to the recent data load. The new data is only displayed by queries that are executed after a successful roll-up.
Go for the below link for more information.
http://sapbibw2010.blogspot.in/2010/10/aggregates.html
Naresh

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

Aggregates in Changerun

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