# Using Performance Metrics

This topic describes how an end user can use the Performance Metrics component.

The Performance Metrics component tracks total MDEX Engine queries as well as queries per data source. It also tracks the overall performance of portlet components as well as the performance of each individual component.

The top portion of the component contains breakdowns of MDEX Engine queries by data source, as well as details on individual component executions. The Performance Metrics component tracks the total number of queries, total execution time of queries, average execution time of queries, and maximum query execution time.

The bottom portion of the component summarizes the average time metrics in pie-chart form.

Note: This component provides a view into MDEX Engine query performance, which does not correlate directly to a page view, as there are often multiple MDEX Engine queries powering a single page.