FIX: The memory allocation and processor usage for the Ocspsvc.exe process keeps increasing if a large CRL is loaded

Consider the following scenario:

• On a server that is running Windows Server 2008 R2, the Online Certificate Status Protocol (OCSP) responder is enabled.
  
  Note To enable the OCSP responder, you must add the Active Directory Certificate Services role to the server.
• A large certificate revocation lists (CRL) is loaded. For example, assume the CRL is 20 megabytes (MB).

In this scenario, the Online Responder Service (Ocspsvc.exe) keeps increasing its memory consumption and its processor usage. Additionally, the performance for the Online Responder Service decreases, and some configuration data is randomly lost.

This issue occurs because of a memory leak in the Online Responder Service (Ocspsvc.exe).

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: 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

To apply this hotfix, your computer must be running Windows Server 2008 R2. Additionally, the computer must have the Online Responder role service installed.

Restart information

You do not have to 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.

For all supported x64-based versions of Windows Server 2008 R2

Additional files for x64-based versions of Windows Server 2008 R2

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

The Microsoft Online Responder Service enables you to configure and to manage OCSP checks of validation and of revocation in a Windows-based network. To support public key infrastructure (PKI) clients in a diverse environment, the Online Responder snap-in enables you to configure and to manage the revocation configurations and the Online Responder Arrays.