Article ID: 282175
Article Last Modified on 3/14/2006
APPLIES TO
- Microsoft SQL Server 7.0 Standard Edition
This article was previously published under Q282175
BUG #: 58078 (SQLBUG_70)
SYMPTOMS
Parallel query performance on a computer with four CPUs is poorer than on a computer with two CPUs if you are using the National Language Support (NLS) sort order with the double-byte character set (DBCS).
You may encounter this problem if all of the following conditions are true:
- You are using the NLS sort order with DBCS.
- The query processor chooses the Parallelism physical operator.
- The table has a column of character data type that is used by the Parallelism physical operator.
RESOLUTION
WORKAROUND
To work around this problem, do one of the following:
- Use the binary sort order.
-or-
- Restrict the number of threads in parallel plan execution, by using the "max degree of parallelism" option or MAXDOP query hint.
STATUS
Microsoft has confirmed this to be a problem in SQL Server 7.0. This problem has been corrected in U.S. Service Pack 3 for Microsoft SQL Server 7.0. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
274799 INF: How to Obtain Service Pack 3 for Microsoft SQL Server 7.0 and Microsoft Data Engine (MSDE) 1.0
For more information, contact your primary support provider.
Additional query words: NLS Parallel Parallelism MAXDOP cpu processor processors proc procs
Keywords: kbbug kbfix KB282175
