Q : I have SQL Server 2000 with approximately 45 databases on a single instance. These databases are used by multiple ASP applications running on my public Web site. SQL Server regularly reaches 100 percent CPU utilization and requires reboots. How should I start troubleshooting and repairing this problem?
A : Start with rebuilding all of your indexes. It’s easy, assuming you have memory configured correctly. Then run SQL Profiler for a few hours and capture a snapshot of your standard business T-SQL traffic. Run this trace through the Index Tuning Wizard (ITW) that comes built into SQL Server 2000. It will take a look at the queries and make recommendations for indexes to improve performance.
If you have SQL Server 2005 installed, you can use the Database Tuning Advisor (DTA) which is the successor to ITW, to tune your workload. DTA can tune SQL Server 2000 as well. It tunes a database on a production server by offloading most of the tuning load onto a test server. DTA uses the production server hardware configuration information, without actually copying the data from the production server to the test server. It only copies the metadata and necessary statistics.
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