Huge number of logins due to "Database Mirroring Monitor job"

Hi all,

I'm facing an issue of huge number of logins which done by "Database Mirroring Monitor Job" job, and as a result of that the entire SQL server is crushing and sometimes only restart of box is helping.

SQL Server version is 2008 R2 Enterprise.

I enabled profiler and figured out it occurred because of the  sys.sp_dbmmonitorupdate stored procedure which periodically called by "Database Mirroring Monitor Job".

Who know about available Hotfix/workaround for this problem?

By saying workaround I don't mean to disable job of course... :)

Thanks in advanced,

Liron