OLAP Performance
Mar 28, 2006
Just to verify that I'm not insane:
Does Reporting Services have SERIOUS problems performance wise with OLAP data? Reports running directly against our relational datawarehouse run FASTER than reports going against the OLAP cubes. How can this be?
<rant>
At first i thought i was just missing something but the "upgrades" to reporting service have been a HUGE dissapointment, at least in the OLAP field:
- They STILL flatten the result set. How can this be after FIVE years??? After all the hype about UDM and improved integration with analysis services they STILL do this???
- Report builder: Has anyone seen a worse implementation of a reporting tool? Report models?? What about the UDM thats supposed to bridge the gap between analysis and reporting? Integration with SSAS? What integration? If anyone is using this for anything serious (and im not talking tech demos) i would like to know.
Is this what Microsoft defines as "Enterprise Reporting"?
</rant>
.. phew.. needed to get that off my chest.
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Mar 17, 2001
I've created a data mart on a SQL Server 7.0 database containing 1 fact table and 6 dimension tables. I then created an OLAP cube based off this table. I used the MOLAP format and created over 900 aggregations until the performance measure got to be about 15%. It took about 45 minutes for the OLAP manager to get to that point.
The size of the actual data isn't that big. The fact table has about 500,000 records in it and the other tables have at the most 1000 records. The SQL Server and OLAP server both run on the same box and have a gigabyte of RAM installed. I believe I have thoroughly indexed the tables.
Here's the problem. I try to access the cube through Office 2000's web pivot table control and it connects just fine. As soon as I add more than 3 dimensions and 1 measure, though, performance goes down to almost nothing. My computer (and other computers in the company) just crawl. It takes about 20 minutes for the control to refresh after you add a 4th dimension. I tried accessing the cube through Excel 2000 and it completely crashes after I add the 4 dimension. I can query the tables directly from SQL and the results are returned incredibly fast.
I've got to be missing something here. Any suggestions? Any help will be greatly appreciated!
Thanks,
Brian Moss
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Sep 6, 2007
Calling any OLAP Guru's. Were attempting to improve a vendors BI process which involves running MDX queries against our SSAS cube, then saves the data into their own proprietary database which is taking to long.
We currently run this process on a x16 CPU, 65GB top end server attached to expensive disk subsystem, however a dual-core processor
laptop completely out performs the expensive hardware by around 45% quicker. Both when the configuration is identical or when we ramp up the processes on the expensive hardware it still performs miserably compared to the laptop. Perfmon counters or Profiler don't so much difference when comparing the server and laptop.
Does anyone know why the laptop completely outstrips the expensive top end hardware perfmance wise although the configuration profile is identical?
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Sep 19, 2000
Hello All,
Our OLAP environment involves an ETL/Data Warehouse/Data Mart server and a cube publisher server.
We would like to learn how to automate the Archival/Restore of OLAP databases. We are currently doing
it manually though OLAP Manager. Any help would be appreciated. Thanks. James.
--
James E. Bothamley
Senior Database Administrator
Dave & Buster's, Inc.
2481 Manana
Dallas, TX 75220
Work
Phone (214) 904-2296
email jbothaml@DaveAndBusters.Com
"Once in a while you can get shown the light
in the strangest of places if you look at it right"
JG 1942-1995 RIP
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Jun 12, 2007
How to repair a corrupted OLAP database?
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Sep 12, 2004
1. Use mssql server agent service to take the schedule
2. Use a .NET windows service with timers to call SqlClientConnection
above, which way would be faster and get a better performance?
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Jun 23, 2006
Hello Everyone,I have a very complex performance issue with our production database.Here's the scenario. We have a production webserver server and adevelopment web server. Both are running SQL Server 2000.I encounted various performance issues with the production server with aparticular query. It would take approximately 22 seconds to return 100rows, thats about 0.22 seconds per row. Note: I ran the query in singleuser mode. So I tested the query on the Development server by taking abackup (.dmp) of the database and moving it onto the dev server. I ranthe same query and found that it ran in less than a second.I took a look at the query execution plan and I found that they we'rethe exact same in both cases.Then I took a look at the various index's, and again I found nodifferences in the table indices.If both databases are identical, I'm assumeing that the issue is relatedto some external hardware issue like: disk space, memory etc. Or couldit be OS software related issues, like service packs, SQL Serverconfiguations etc.Here's what I've done to rule out some obvious hardware issues on theprod server:1. Moved all extraneous files to a secondary harddrive to free up spaceon the primary harddrive. There is 55gb's of free space on the disk.2. Applied SQL Server SP4 service packs3. Defragmented the primary harddrive4. Applied all Windows Server 2003 updatesHere is the prod servers system specs:2x Intel Xeon 2.67GHZTotal Physical Memory 2GB, Available Physical Memory 815MBWindows Server 2003 SE /w SP1Here is the dev serers system specs:2x Intel Xeon 2.80GHz2GB DDR2-SDRAMWindows Server 2003 SE /w SP1I'm not sure what else to do, the query performance is an order ofmagnitude difference and I can't explain it. To me its is a hardware oroperating system related issue.Any Ideas would help me greatly!Thanks,Brian T*** Sent via Developersdex http://www.developersdex.com ***
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Aug 2, 2005
Hi,
I am looking at deploying an ASP.NET site which accesses an OLAP database - Microsoft Analysis Services
My question is how is this normally done:
Straight SQL / Stored Procedures
3rd party Adhoc plugin
Anything else
If there is anyone out there with experience in using ASP.NET and
Analysis Services I would be interested in hearing how they did it -
Database Architecture
System Architecture
and any
pitfalls etc...
Thanks in Advance
Jerry
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Aug 12, 2005
Does any one know a very good control for OLAP in ASP.NET?
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Jul 28, 2000
How do I use vba string functions in MDX queries? The on-line help says that the functions can be used but I can't figure out the right syntax for it. PLEASE HELP!
I want to take the first letter from a level i.e.([NET INCOME] in the e.g. below) and display it.
For eg.
WITH MEMBER [DIMENSION].[NET INCOME].A AS 'LEFT({[DIMENSION].[NET INCOME].MEMBERS,1})'
SELECT
measures ON COLUMNS,
[DIMENSION].MEMBERS ON ROWS
FROM CUBE a.
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Jan 17, 2001
I have install OLAP srvice on SQL Server 7.0 server.
When I try to connect to OLAP server I get the following error:
'cannot connect to the registry on the server computer'
Does anyone know how to fix this problem.
Thank You,
Mark
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Sep 25, 2001
Has anyone tried installing an OLAP Manager 2000 instance on a server that already supports SQL 7.0 and OLAP 7.0? We will not be using the OLAP 7.0 instance so we would like to either upgrage OLAP 7.0 to OLAP 2000 or unistall OLAP 7.0 altogether. Any feedback would be helpful. Thanks. James.
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Jul 7, 2004
hi,
i need "microsoft(r) sql server(tm) 2000 analysis services step by step" in digital,can you help me ?
shawnlee@cena.com.cn
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Jan 20, 2004
i do not know if i am posting in the right place so forgive me if i have.
also i have search and cannot find any answers to this.
ok, i have Windows server 2003 and i want to run SQL on it, i got SP3a and i found out i need something like OLAP, and my PC does not have OLAP on it.
so i was wondering if someone will tell me how/where i can get if from.
thanks alot.
Mrbob2
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Mar 20, 2007
Mary writes "Hi
Could you give me some notes about ALAP ? What is ALAP exactly? What is the usage of this part of SQL? Could you give me some example.
Thanx"
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Jul 6, 2001
I was working with an OLAP Services Processing Task when I ran
into some difficulties. I was prompted with a message which told
me that the object could not be found.
When I went back to the OLAP Manager I was not able to see the
databases for that server.
Does anyone know why I can no longer see these databases i have
tried refreshing/rebooting......??
Thanks,
Ruaidhri.
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Oct 2, 2000
Analysis services is installed on a Windows 2000 server (call it computer A) in Domain A. SQL 2000 has been installed on the server using mixed security. All of the SQL services are running under an account in Domain A (not local system).
The problem is the computer (call it computer B) I wish to run Analysis Manager on and use to administer the Analysis services on Computer A is in Domain B. There are no trusts between Domain A and Domain B.
Can Analysis services be administered by a computer in a domain not trusting the domain that the server running Analysis server is in?
Any help would be appreciated.
Thanks
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Dec 6, 1999
Hi,
Can anyone tell me where to fine some good help on designing Date type dimensions in an OLAP cube.
This particular thing has been a pain for me..
I have a Time dimension in my CUBE which has year-week-day as levels.
I want the week to start from Monday and span seven days ( naturally !! ). But OLAP surprises and entertains me by showing different number of days in every week. Whatever I do, it never starts a week on Monday and spans it for next 7 days consistently.
Help.
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Mar 29, 1999
I've installed SQL7.0 and OLAP service on my PC(windows 95), but I cannot find the OLAP Manager. Can an OLAP Manager be installed on Windows 95? If it cannot, can I create an OLAP database (or application) on my PC?
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Apr 15, 1999
Anyone managed to get the OLAP server installed onto SQL7 Desktop?
I'm running it on Win98 and the installation only offers the Client and sample applications.
Obviously the client won't connect as there's no server to connect to.
The documentation on what does/doesn't run in Desktop version doesn't mention OLAP server.
Please email reply to me at RussLewis@msn.com
Thanks
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Mar 2, 1999
I have installed OLAP services along with SQL Server 7.0. I want to use the sample MDX application supplied with the CD. When I try to use the dsample application, it comes up with a dialog to enter the server name and gives me an error unable to connect to the OLAP server.
My computer is Windows 98. Do I need to install OLAP Server ? If so how ?
Thank you
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Mar 8, 2001
I can't find anything written about licensing for OLAP anywhere. Do I presume correctly that it doesn't require one of its own?
Thanks for any info.
Simon
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Jun 6, 2001
I keep getting this error when trying to connect users to the OLAP server from
Excel.
"Unable to open connection.
Cannot Connect to server 'OLAP Server Name'.
OLAP server error: The operation failed due to network problems."
When I use this excel locally on my machine it works just fine. Any ideas?
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Oct 4, 2004
So I am starting to look at an OLAP problem having been an OLTP DB wonk for several years.
All very nice. Am bending my head aorund cubes and the dimensions trciks and learing to choose them more carefully.
Have wokred through the various chapters of various SQL books (OLTP books with a couple of chapters of OLAP I admit) and am starting to feel if not comfortable with it at leats not compleetly terrified.
Now the Analysis manager in SQL is all well and good but I'm not about to hand it to the accounting monkeys that work here.
Does anyone have any suggetsions of some good OLAP specific books and any Cube viewing tools/suites/utilities that I can give to the computer-illiterate bean counters I work for?
many thanks
Steve
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Jul 17, 2006
Hello DBForums
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Jan 15, 2007
Hi Guyz ,
I'm new to this forum and as well as new to OLAP testing . I would like to know OLAP testing and guidance for SQL server anlaysis services .
I have been trying install SQL server 2000 in my system but it not going through, Can anybody send information how to install SQL server and how to play with sample database.
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May 31, 2007
I'm trying to retrieve calculated members from a cube using the OPENQUERY function and a OLAP linked server, the results from MDX Queries are then stored to a SQL Server DB Table.
below is the error message I get:
Could not get the data of the row from the OLE DB provider 'MSOLAP'.
OLE DB error trace [OLE/DB Provider 'MSOLAP' IRowset::GetData returned 0x80040e21: Data status returned from the provider: [COLUMN_NAME=[Measures].[first column] STATUS=DBSTATUS_E_UNAVAILABLE], [COLUMN_NAME=[Measures].[second column] STATUS=DBSTATUS_E_UNAVAILABLE]]
When I run the same query in MDX Sample Application it works fine!
Any help Please!
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Dec 19, 2007
hello everyone,
Is it make sense to create 2 databases, OLTP for the insert, update and delete and OLAP for selection
and i'll sync between the 2 databases.
Thanks
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Mar 3, 2004
When I try to modify a OLAp Cube, suddenly appears a Error message
"Unknow Error. Restart the Application"
And this break my cube down
This is not always, just some time, for example when I proof the cube on Microsoft Excel or After I backed up the databes of analysis
What can I do?
I'll thanks your quick answer
NOTE: My cube use MOLAP aggregations
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Aug 28, 2007
Can somebody please go in depth detail what exactly is done in OLAP? i know it deals with the data warehouse end. but what does the SQL DBA do in the OLAP end? please elaborate. thanks.
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Mar 16, 2006
Hi everyone, Sql express support olap server?, because I try it to make an a Pivot table in Ms Excel, but i can't, then Sql server have this feature?thx.p.d: sorry but my english :P
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Mar 21, 2007
HI, i am new to OLAP in Sql Server 2005, bascially i have read through lots of article on this OLAP and basically i get to know how it works and function theorically, but i could not find an article to show me step by step on how to create the cube and how to query the data from the cube. Would very much appreciated if somebody out there can explain to me in details how to i create cube from sql server 2005 as i totally no idea at all. Though i can view the sample cude in sql server 2005, but i dunno how to create it from my relational database. I need it very urgent as needed by my job functionality. Hope to get some explanation from you guys asap. Just assume i am totally new and please guide me step by step to create a normal and simple cube and query from the cube. I just need to create simple prototype. Thanks alot yea guys :)
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May 30, 2006
Which forum do i go to to ask questiosn about configuring olap reports with .net 2005
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