•”Stopping Performance Collectors” on page 195

•”Setting the Date and Time for Performance Collectors” on page 195

•”Viewing Data Aging Statistics for Performance” on page 196

Managing Performance Collectors

The management server uses performance collectors to gather information for Capacity Manager and Performance Manager charts, as well as for monitoring. Use Data Collection page for Performance collectors to stop and start collectors as well as schedule when they run. Each row in the table corresponds to a collector. The Element Type column displays which element the collector gathers data for, and the Statistics column displays which statistics for that element the collector is tasked to gather.

For example, assume you see host_A in the Element Type column and Processor Utilization in the Statistics column. That collector gathers data about processor utilization for host_A.

You can have multiple collectors for an element. Let's go back to the example of host_A. Assume this host has another collector. Underneath the first row there is anther row for the second collector. The Element Type is host_A, but this time the following statistics are listed: Physical Memory Used, Free Physical Memory, Virtual Memory Used, Free Virtual Memory. The second collector gathers information about all of those statistics listed for host_A.

You can see the result of these statistics in Capacity Manager and Performance Manager. When you select one of the following options from the Period combo-box, you can view the information these collectors gathered. Real time statistics are not affected by these collectors

•Last Hour*

•Last 24 Hours*

•Last 7 Days

•Last Month

•Last Year

*Only available in Performance Manager

IMPORTANT: All collectors are stopped during Get Details/Discovery Data Collection. This means that during Get Details/Discovery Data Collection data, such as for Performance Manager, is not updated. Historical collectors, such as those available from the Configuration tab, are restarted when they are stopped during Get Details/Discovery Data Collection. Any charts that were active in Performance Manager when Get Details/Discovery Data Collection was started are not restarted.

To manage performance collectors, click Optimize > Storage Essentials > Performance Data Collection.

194 Configuring the Management Server