In Microsoft SQL Server 2008, you configure the management data warehouse for an instance. When you view the Server Activity History report in SQL Server Management Studio, you may find that the Disk I/O Usage chart and the Network Usage chart contain incorrect data. The throughput data is much smaller than the actual data. For example, if the disk throughput data is 150 MBps, the chart shows 0.00015 MBps. The incorrect throughput data is the actual data divided by 1,048,576.