How to Limit Performance Data Collection in Microsoft Operations Manager 2000 (300120)

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There are several ways to limit collection of performance data in MOM.

• You can disable the rule for a resource that you do not want to monitor. For example, if you do not want to monitor the Total I/O hit ratio when it goes below the threshold, disable that Performance Processing Rule.
• In some cases, if there are too many sessions, you can choose to monitor only some instances of the counters.
• By default, MOM collects "all" instances, which means every available instance. You can modify the rule to sample counters for only some specified instances, such as rdp_tcp8 and rdp_tcp9.
• You can sample the counter less frequently. For example, modify the data provider for the rule to sample every half-day instead of four times an hour.

To adjust the sampling frequency and the instances that are monitored, follow these steps:

1. Go to the Performance Processing Rule that you want to modify, right-click the rule, and then click Properties. Click the Data Provider tab, and then click Modify.
2. In the window that appears, Windows NT Performance Counter Properties-name, under Instances, click the sessions that you want to monitor.
3. To change the sampling frequency, go to the line Sample every ____, and then specify a different time interval.
4. Click Apply, and then click OK.