The log file size grows larger than the maximum file size limit that was set in Performance Monitor if you select a Comma Separated log format or a Tab Separated log format on a computer that is running Windows Server 2008 or Windows Vista

Hotfix Download Available
View and request hotfix downloads

View products that this article applies to.

SYMPTOMS

Consider the following scenario:

You use the Data Collector Sets feature in Performance Monitor (Perfmon.exe) to collect data.
In the Properties dialog box of a data collector set, you set a value in the Maximum Size field that is located on the Stop Condition tab. For example, you set a value of 30 megabytes (MB).
In the Properties dialog box of a created data collector that is in the data collector set, you select Comma Separated or Tab Separated in the Log format list.
You use Performance Monitor to collect performance counters and to save them to a log file.

In this scenario, the maximum file size limit that you set in the Maximum Size field does not work. Therefore, the log file size keeps growing over the maximum file size limit.

This problem occurs on a computer that is running one of the following operating systems:

Windows Server 2008 Service Pack 2 (SP2)
Windows Server 2008
Windows Vista Service Pack 2 (SP2)
Windows Vista Service Pack 1 (SP1)

Back to the top

CAUSE

This problem occurs because the Performance Data Helper (Pdh.dll) module does not handle the maximum file size limit correctly. This behavior occurs when the module saves collected data to one or more log files that are formatted by using the Comma Separated format or the Tab Separated format.

Back to the top

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 the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

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, contact 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 (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.

Important Windows Vista and Windows Server 2008 hotfixes are included in the same packages. However, only one of these products may be listed on the “Hotfix Request” page. To request the hotfix package that applies to both Windows Vista and Windows Server 2008, just select the product that is listed on the page.

Prerequisites

To apply this hotfix, the computer must be running one of the following operating systems:

Windows Server 2008 Service Pack 2 (SP2)
Windows Server 2008
Windows Vista Service Pack 2 (SP2)
Windows Vista Service Pack 1 (SP1)

Restart requirement

You must restart the computer after you apply this hotfix.

File information

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.

Windows Vista and Windows Server 2008 file information note

The files that apply to a specific product, SR_Level (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table.