Part of the improvements to Database Mirroring in SQL Server 2008 are the addition of 10 new performance counters under the Database Mirroring Performance Object. These add some cool troubleshooting capabilities. SQL Server 2005 provided the following 11 counters (from Books Online): Name Description Bytes Received/Sec Number of bytes received per second. Bytes Sent/sec Number of bytes sent per second. Log Bytes Received/sec Number of bytes of log received per second. Log Bytes Sent/sec Number of...(
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Read the complete post at http://www.sqlskills.com/blogs/paul/2007/10/01/SQLServer2008NewPerformanceCountersForDatabaseMirroring.aspx