Cube with aggregation more slow that a cube without aggregation
Hi,
I have a SSAS 2012 database that I am trying to tune to give more performance.
I improve several best practices like define attribute relationships between attributes and also create aggregations (with bids helper) to try so tune the speed of the query.
But every time I compare my Cube with the old without aggregations the times are almost the same.
I run the Sql profiler and I saw that the aggregations are used but at the end a Query Subcube is always done I increase the duration of the query.
If my query can get all from the aggregation it's usual to do at the end a Query SubCube ?
In the Old Cube no aggregations are used and all information is used by the partition and query Subcube.
Thanks,
Manuel Gomes
Hi Gomes,
If I understanding correctly, you encounter performance issue when using SQL Server Analysis Services. Since not know the structure of you SSAS database, it hard to give your the root reason that cause the performance issue. I'd suggest you enable SQL
Sever profiler to monitor the queries fired by the process, once you find some queries took a very long time to run, consider creating the smaller cube partition or optimzing the query by adding index or partition to improve the query performance.
Here are some links about performance tuning, please see:
http://www.mssqltips.com/sqlservertip/2565/ssas--best-practices-and-performance-optimization--part-1-of-4/
http://technet.microsoft.com/en-us/library/cc966527.aspx
Hope this helps.
Regards,
Charlie Liao
TechNet Community Support
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scheduler allocate 20000 1000
endI don't have an answer for you but would like to add a note. I was initially configuring and troubleshooting some things on a HA cube pair recently. I was using external DNS for some dial-peer session target lookup and noticed the non-active CUBE could not lookup DNS. When the non-active CUBE became active it could all of a sudden resolve DNS. So I am speculating that something to do with the HA configuration is disallowing communication or bindings preventing routing to the rest of the network from the non-active CUBE. I ended up putting local host records on the router to make me feel better. I am guessing whatever is causing that might be related to the reason your SCCP is loosing registration on the non-active CUBE.
Jaime says what you are trying to do is not supported anyway. I would like a a little clarification on that but what I believe to be supported is if you need transcoding or mtp resources for this CUBE only (Not registered to UCM) then LTI is a good option.
http://www.cisco.com/c/en/us/support/docs/voice-unified-communications/unified-border-element/115018-configure-cube-lti.html
Hope any of this helps. I am really commenting so I can track any updates to this thread. :) -
Connecting SQL Analysis Services 2005 cube with obiee 10g
Hello experts,
I'm trying to link an SQL Analysis Services 2005 cube with obiee 10g.
In Oracle BI Administration, when I choose File -> Import -> From
Multi-dimensional, I have to fill the next gaps:
Provider Type: Analysis Services 2005
URL: ***********
User: blank
Password: blank
Before to do that, I need to create the URL path.
To create the URL, I have followed this link.
http://erpthings.blogspot.com/2008/08/obiee-connection-to-msas-2005-
cube.html
But, it hasn't worked because when I was trying to configure the HTTP
access to SQL Server 2005 Analysis Services, we have to perform a test to ensure that it has been well configured. In IIS -> WebSites -> Default WebSites -> olap, we should browse the document called "msmdpump.dll" and this should show an xml document, but it doesn't.
Thanks!Hi Alex
It sounds like your MS data pump might not be configured correctly. First ensure that is working before trying to put the values into OBIEE. Don't worry about the 500 error - I get that too instead of an XML page.
You can read a bit more about SSAS support on my blog here:
http://total-bi.com/2010/12/obiee-sql-server-analysis-services-cubes/
Here's the link to Microsoft's description of setting up msmdpump.dll
http://technet.microsoft.com/en-us/library/cc917711.aspx
Paul -
Integrating Essbase cubes with Oracle Tables in BI Server
I'm trying to link together data from an aggregated Essbase Cube with some static table data from our oracle system. Both the essbase and oracle data exist correctly in their own right in the physical, business and presentation levels. Aggragted data is client sales, static data is client details
Within the OBIEE Administration tool I've tried to drag the physical oracle table for clients onto the clients essbase section in the business area, and it seems to work OK, until you try and report on them together and I get the following error:
State: HY000. Code: 10058. [NQODBC] [SQL_STATE: HY000] [nQSError: 10058] A general error has occurred. [nQSError: 42043] An external aggregate is found in an outer query block. (HY000)
Can anyone advise on what I'm doing wrong?
ThanksThanks Christian I found some very useful articles (one or two by you) - I'll have to look harder on the net before posting.
One thing I found out, with respect to vertical federation, that others may benefit from, is that I fuond it much easier to start from the most detailed level and then attach the less detailed source rather start with the less detailed and add the additional on. -
Using Pivot-Slicers on a SSAS Cube with Access Rights
Dear all,
we're using a SSAS Cube and try to access the data by an Excel Pivot. That works fine.
Furthermore, we are using the slicer feature of Excel 2010 to select the specified data.
The problem is that we have a dedicated rights concept and only some users are allowed to see all dimension elements. Other users are not allowed to see all the data. This is ok and works for Pivots, as we can see there only the elements which the respective
user is allowed to see. In the case of slicers this doesn't work: the slicers always show all dimension elements (the restricted ones with 0-values). Can this somehow be repaired, so that the user only sees the elements in the slicer he's allowed to see?
Best Regards
BjoernHi Charlie,
I guess we have some kind of language barrier here because i did not fully understand your explanation.
I've got a User Günther who is only to allowed to see the revenues of his own company.
Therefore, he has got a restriction on the company-dimension, which has 100 companies. He is only allowed on his own company.
If we open a new pivot with the company dimension, he will only see 1 column (with his company) instead of 100.
If I currently add a slicer to the pivot, the list of elements in the slicer contains 100 companies. All of them are also shaded (which shows, that data is available). If i click on a shaded company, on which he is not allowed, Günther only sees zero-values
(0,00).
In this case, it would be better to only see the 1 company the slicer shaded, which has values that Günther is allowed to see. Then, he would only see his own company shaded and 99 would have the look like being "without data".
If my proposal would be impleneted, it would be much easier to use excel BI services on a big SSAS cube with multiple dimensions and multiple users that have different access rights.
The best would be, if a slicer could be customized in more details (e.g., with a mdx query).
// Do I perhaps have misplaced the question into the wrong forum?
Best Regards
Bjoern -
About Multicube vs a giant cube with Aggr
Hi Gurus,
i got this question, whay is the best decition about design,
1- create a cube per year that is feed from ECC , for example cube data 2011 and cube data2012 and above this one, a Multicube, then the report
2- Create a Giant Cube with aggregates
help guys,Hi Jorge
I would go for option one but still have aggregates.
Option 1 actually splits your data in different cubes. Cubes with less data is always favorable for administrative work and report runtime.
Like compression, roll up, creation and deletion of Index is easier in small cubes. Moreover if there is any issue in data level you can always check from smaller cubes fast. If the cube is very large Display Data is a pain.
One more point is , once you load historical data in different cubes, you do not need to touch them because they are already frozen. You just need to take care of the cube which contains current data.
Aggregates on the other hand takes extra space on the database. Administration of aggregates is also required . Like daily roll up adds to your data load time. More over aggregates are very specific to query. One aggregate can not satisfy all the query.
It's better to have different cubes and then you can have small aggregates on those cubes. This would make your administration easy and query response time will be faster.
PS: If multiprovider has different cubes for 2010,2011 and 2012 even if the query only wants 2012 data , backend system would read 2010 and 2011 cubes also. You can have a filter on 0INFOPROV in query level to prevent that.
Regards
Anindya -
Initial loading with less added record in a cube
Hi Everybody,
I have loaded a Initial delta into a cube. in that cube there are more than one lakh entries are transfered, but only 30,000 records are added, i donot know why it happened? how can i solved? help me...Hi Jaya,
It is not a problem with no of records
as cube is aggregates the key figure value.
match the infocube data with PSA........if u find any missing records then debug the routines........ -
Avoid cubes with single dimension
When designing SSAS CUBE in SQL SERVER BIDS 2008R2 we get a message on the cube object stating "Avoid cubes with single dimension".
We are using just 1 dimension and 1 fact table .
Is there any specific reason for this issue ?
MudassarHi Mudassar,
This rule analyzes cube dimensions to determine whether a cube contains only one cube dimension. Generally, a cube that contains only one cube dimension should have that dimension split into multiple cube dimensions based on logical business entities. Splitting
a single cube dimension into multiple cube dimension will also improve usability in most user scenarios. This is the best practices recommendation from Microsoft when designing dimension. Because under most circumstances, if the cube only contains one dimension,
it means that all the attributes were put into this dimension.
In your scenario, you just use one dimension and one fact table. So you get this warning. And you needn't split the dimension into multiple dimension since there is only one dimension used in your cube.
For more information about how to define dimensions, see
Designing Dimensions in SQL Server Books Online.
Regards,
Charlie Liao
TechNet Community Support
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