If you try to connect to SQL Server 2000 Analysis Services
and you have installed Analysis Services Service Pack 3 (SP3), the connection
fails. You may receive one of the following error messages:
Error message 1
Cannot open connection to Analysis server '<Server
Error message 2
Unable to open connection.
The operation requested failed due
Error message 3
In the Application event log:
The memory conservation threashold was exceeded by more than 12.5
percent for an extended period.
If you are already connected to the Analysis Services server, the connection may be lost. Additionally, you receive the following error message:
unable to open cellset. The operation requested failed due to timeout error
This problem occurs because in Analysis Services SP3, the
connections to Analysis Services services are blocked when the memory that the msmdsrv
process uses exceeds 112.5 percent of the memory conservation
threshold value (HighMemoryLimit
You receive the additional error message if the cleaner thread is not able to release memory within a timeout period. The existing connection is lost to avoid a system hang.
To work around this problem, set the memory conservation
threshold to a value that is greater than the memory that the msmdsrv
process uses. To set the memory conservation threshold, modify
registry key value. To do so, follow these
Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.Note
Before you follow these steps, make a note of the memory that the
process uses immediately after you start Analysis Services.
- Click Start, and then click
- Type regedit, and then click
- Locate the following registry key:
- In the right pane, double-click
- In the Edit DWORD Value dialog box, click
- In the Value data box, type a value that
is greater than the memory that the msmdsrv process uses, and then click OK.
- Quit Registry Editor.
If Analysis Services is enabled to use 3 gigabytes (GBs) (that
is, the /3GB
switch is enabled in the Boot.ini file), set the memory
conservation threshold to a decimal value of 2778726400.
For more information, click the following article numbers to view the articles in the Microsoft Knowledge Base:
Connection timeout occurs when connecting to a remote OLAP server using an ADO connection
Different kinds of Analysis Services timeouts
Long running OLAP queries do not return data when connected through HTTP
How to enable Analysis Server to use 3 GB of RAM