FIX: Queries in multiple threads run much slower when you use the SQL Server 2005 Java Database Connectivity (JDBC) driver 1.2 than when you use the SQL Server JDBC driver 2.0

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Article ID: 956351 - View products that this article applies to.
Bug #: 50003070 (SQL Hotfix)
Notice
Microsoft distributes Microsoft SQL Server 2005 fixes 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 2005 fix release.
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SUMMARY

This article describes the following about this hotfix release:
  • The issues that are fixed by the hotfix package
  • The prerequisites for installing the hotfix package
  • Information about whether you must restart the computer after you install the hotfix package
  • Information about whether the hotfix package is replaced by any other hotfix package
  • Information about whether you must make any registry changes
  • The files that are contained in the hotfix package

SYMPTOMS

In SQL Server 2005, you run some queries in multiple threads. To do this, you use the SQL Server 2005 Java Database Connectivity (JDBC) driver 1.2 to query data. When you do this, the queries run much slower than when you run the same queries by using the SQL Server JDBC driver 2.0.

CAUSE

This problem occurs because a contention occurs on the Logger object. All threads are blocked on the object. Therefore, performance decreases.

RESOLUTION

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=support
Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

You must have SQL Server 2005 JDBC driver 1.2 installed to apply this hotfix.

Restart information

You do not have to restart the computer after you apply this hotfix.

Registry information

You do not have to change the registry.

Hotfix file information

This hotfix contains only those files that are required to correct the issues that this article lists. This hotfix may not contain of all the files that you must have to fully update a product to the latest build.

The English version of this hotfix has the file attributes (or later file attributes) 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 item in Control Panel.
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File nameFile versionFile sizeDateTime
Sqljdbc.jar1.2.2828.20479,93628-Jul-200806:44

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

MORE INFORMATION

For more information about the naming schema for SQL Server updates, click the following article number to view the article in the Microsoft Knowledge Base:
822499 New naming schema for Microsoft SQL Server software update packages
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates

Properties

Article ID: 956351 - Last Review: March 30, 2009 - Revision: 2.0
APPLIES TO
  • Microsoft SQL Server 2005 Java Database Connectivity Driver
Keywords: 
kbsql2005connect kbautohotfix kbhotfixrollup kbfix kbpubtypekc kbqfe kbexpertiseadvanced kbhotfixserver KB956351

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