# Load Test System Resource monitor

This section describes the Load Test System Resource monitor graphs that are available during a test run.

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## Load Test System Resource monitor graphs overview

The Load Test System Resource monitor measures basic Windows monitor data for all host machines involved in a performance test (except for OFW, Docker, and cloud load generator machines). This data (Host CPU, disk space, and memory) is available during a performance test run in the online graphs, or afterwards when collating and analyzing the results.

The Load Test System Resource monitor is enabled by default—it automatically begins monitoring Vusers at the start of a performance test.

Note: To monitor load generators using the default monitors, the user account on the load generator hosts must have the same credentials as the LoadRunner Enterprise account and have permissions to connect. We recommend adding a corresponding user to the load generator machines with the required permissions. You can disable the default monitors from the Test Options. For details, see Configure general test options.

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## Hosts - CPU Utilization graph

The monitor's Hosts - CPU Utilization graph provides information about the percentage of time that the CPU is utilized in the current performance test on all load generator machines.

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## Hosts - Disk Utilization graph

The monitor's Hosts - Disk Utilization graph provides information about the percentage of time that the Disk is utilized in the current performance test on all load generator machines.

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## Hosts - Memory Utilization graph

The monitor's Hosts - Memory Utilization graph provides information about the percentage of time that the memory is utilized in the current performance test on all load generator machines.

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