Dear all,
(double posting from Lync Server 2013 topic)
I am facing a high CPU load on my lab Lync 2013 FE servers (both on an Enterprise FE server and a Standard FE server). No live users on the system (only 1 user logged in), purely a lab environment, completely idle.
Symptom: SQL server process (RTCLOCAL instance) consumes 80-90% CPU, and this activity is running for a very long time (since a couple of hours right now so I am not sure it will ever finish, or got stuck). If I manually restart the RTCLOCAL SQL instance service, the CPU load goes back to normal idle, and does not increase again.
The RTCLOCAL instance "tempdb" file is frequently accessed during this activity. It seems some infinite loop is happening, that cannot be finished in timely manner. I have looked at the SSMS Activity monitor, however I'm not a DB expert to recognize the issue from those counters. There are a couple of "Recent expensive queries", the top one regarding to "Microsoft.Rtc.Management.Xds.AppLayer.2008" having 30-60 executions/min, which sounds quite high to me.
Also, I have experienced a very similar issue on a Lync 2010 SE server a year ago, however I dont have the details anymore to confirm this.
Did anybody experience similar issues in the SQL process of Lync? I will not restart the SQL process for some time, so if anyone has idea how to troubleshoot this, I am happy to provide feedback, maybe catching a bug here?