Article ID: 840223 - View products that this article applies to.
Bug #: 14305 (Plato7x)
Microsoft SQL Server 2000 fixes are distributed as one downloadable file. Because the fixes are cumulative, each new release contains all the hotfixes and all the security fixes that were included with the previous SQL Server 2000 fix release.
When you process dimensions that have virtual dimensions that are based on them in SQL Server 2000 Analysis Services, the Analysis server computer stops responding when the Lazy Aggregation thread fires. Additionally, the underlying dimension file is corrupted. The Analysis server computer restarts, reads the corrupted dimension file, and then stops responding again. This process continues until you remove the corrupted dimension file from the Analysis Services data folder.
Service pack informationTo resolve this problem, obtain the latest service pack for Microsoft SQL Server 2000. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/290211/ )How to obtain the latest SQL Server 2000 service pack
Hotfix informationThe English version of this hotfix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
SQL Server 2000 Analysis Services
Date Time Version Size File name -------------------------------------------------------------- 08-Apr-2004 16:32 8.0.931.0 221,760 Msmdcb80.dll 08-Apr-2004 16:32 22.214.171.1241 4,063,808 Msmddo80.dll 08-Apr-2004 16:32 8.0.931.0 1,032,768 Msmdgd80.dll 08-Apr-2004 16:32 8.0.931.0 172,608 Msmdpump.dll 08-Apr-2004 16:32 126.96.36.1991 9,638,468 Msmdsgn80.dll 08-Apr-2004 16:32 8.0.931.0 1,835,588 Msmdsrv.exe 08-Apr-2004 16:32 8.0.931.0 2,081,360 Msolap80.dll 08-Apr-2004 02:09 8.0.931.0 213,068 Msolap80.rll
SQL Server 2000 Analysis Services 64 bit
Date Time Version Size File name -------------------------------------------------------------- 08-Apr-2004 18:24 8.0.931.0 5,492,736 Msmdcb80.dll 08-Apr-2004 18:24 8.0.931.0 5,801,984 Msmdgd80.dll 08-Apr-2004 18:24 8.0.931.0 5,130,752 Msmdpump.dll 08-Apr-2004 18:24 8.0.931.0 5,993,472 Msmdsrv.exe 08-Apr-2004 18:24 8.0.931.0 6,671,360 Msolap80.dll 08-Apr-2004 16:44 8.0.931.0 201,216 Msolap80.rll
Note Because of file dependencies, the most recent hotfix or feature that contains these files may also contain additional files.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
This problem was first corrected in Microsoft SQL Server 2000 Service Pack 4.
This hotfix includes a fix that addressed an issue that causes the corruption of dimensions when a Lazy Aggregation processing thread is executed after it processes dimensions that are used in virtual dimensions. Because of that fix, if you incrementally process a virtual dimension, a lazy aggregation processing thread executes. While the lazy aggregation thread executes, the aggregations for that dimension are deleted from each partition.
The lazy aggregation thread executes as a low priority background thread and rebuilds the aggregations for the dimension in each partition. While the lazy aggregation thread executes to rebuild the aggregations, MDX query execution may be significantly slower. The degradation in query performance occurs because of the lack of aggregations. The lack of aggregators causes the server to read values from the leaf level of each partition.
After the lazy aggregation thread finishes rebuilding the aggregations for each partition, you no longer see the degradation in query performance. The query performance degradation during lazy aggregation may be unacceptable in certain situations, such as in high-demand cubes in enterprise applications. If applying this hotfix causes unacceptable query performance degradation, we recommend that you consider the following alternatives during lazy aggregation:
(http://support.microsoft.com/kb/824684/ )Description of the standard terminology that is used to describe Microsoft software updates
Article ID: 840223 - Last Review: November 21, 2006 - Revision: 4.2
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