Consider the following scenario:
Microsoft SharePoint Server 2010 is installed on Domain A.
You configure the value of ForceClaimACLs to 1 by following the steps that are described in Microsoft Knowledge Base (KB) article 2344518.
You run a full crawl to enable the new access control list (ACL) format across the content.
In this scenario, the search daemon file grows very large. For example, the file size is 8 to 10 gigabytes (GBs).
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
To resolve this issue, install the following update packages:
2516471 Description of the SharePoint Server 2010 hotfix package (osrchwfe-x-none.msp): April 26, 2011
2516472 Description of the SharePoint Server 2010 hotfix package (sts-x-none.msp): April 26, 2011