1 Chapter Overview Developing a Performance Monitoring Methodology Choosing Among Monitoring Tools Performing Monitoring Tasks

2 Performance Goals User perspective—minimize response time per query. Server perspective—maximize the number of queries serviced. User perspective is subjective. Server perspective can be objectively measured.

3 Performance Bottlenecks Performance limited by excessive demand, bad design, and/or insufficient resources. Low numbers can be as meaningful as high numbers. Solving one bottleneck will often reveal another. At some point, resolving bottlenecks ceases to appreciably improve performance.

4 Trend Analysis Establish an initial performance baseline. Update the performance baseline periodically. Analyze changes in the baseline to identify trends. Usage tends to change over time, revealing new bottlenecks.

5 Resources and Activities to Monitor Inadequate hardware resources and competing server applications Network congestion Cursors and ad hoc queries Excessive blocking locks and deadlocks

6 Windows 2000 System Monitor

7 Task Manager

8 SQL Profiler

9 Current Activity Window in Enterprise Manager

10 Transact-SQL System stored procedures Database Consistency Checker (DBCC) Built-in functions Trace flags

11 Resource Use Monitoring Task Manager Processes tab Performances tab Windows 2000 System Monitor Chart view Histogram view Report view

12 Memory Objects and Counters

13 I/O Objects and Counters

14 Processor Objects and Counters

15 Monitoring Stored Procedures, SQL Batches, and User Activity Long-running query trace Stored procedure performance trace Cause of deadlock trace Logins and logouts Individual user activity

16 Current Locking and User Activity Monitoring

17 Chapter Summary Develop a monitoring methodology, and monitor periodically to detect developing trends. Understand the range of monitoring tools and their capabilities. Use System Monitor and Task Manager to monitor resource usage. Use SQL Profiler to detect specific SQL Server events. Use the Current Activity window to view current processes and locks.