Keep in mind that you probably don't want these products running against your SQL Server machine 24x7, since they may take resources away and actually contribute to the problem. I'm sure they are tuned to prevent that, for the most part, but it's doubtful that they could do anything useful without adding *some* resource drain.
If you're troubleshooting a performance problem, might want to double-check configuration options against the recommended set; see the following KB articles.
KB #319942 HOW TO: Determine Proper SQL Server Configuration Settings
KB #310834 PRB: Common Causes of Error Message 844 or Error Message 845
KB #298475 HOW TO: Troubleshoot Application Performance Issues
KB #297864 INF: Performance Considerations for Upgrade from SQL Server 6.5
KB #254321 INF: Clustered SQL Server Do's, Don'ts, and Basic Warnings
KB #243589 INF: Troubleshooting Slow-Running Queries on SQL Server
KB #243588 HOW TO: Troubleshoot the Performance of Ad-Hoc Queries
KB #224587 HOW TO: Troubleshoot Application Performance with SQL Server