An update is available to optimize the CPU usage of the RtcpIsLocalServiceCluster function in a Lync Server 2010 database Content provided by Microsoft Symptoms The RtcpIsLocalServiceCluster function consumes excessive CPU resources in a Microsoft Lync Server 2010 database. Cause The issue occurs because lots of stored procedures use a macro that calls the RtcpIsLocalServiceCluster function. Resolution To resolve this issue, install the following cumulative update:2571545 Description of the cumulative update for Lync Server 2010, Core Components: July 2011 Last Updated: Jul 25, 2011 Did this solve your problem? Yes No Tell us what we can do to improve the article Submit Thanks! Your feedback will help us improve the support experience.