HP Vectra VE 5/xx hp toptools for desktops agent, resource monitoring and perf - Page 3

Resource Monitoring Example 1 This shows the monitoring of hard disk drives on a single remote Vectra PC. The PC has two logical hard disk drives, C and D. For each, disk usage (over a time period) and the current amount of free disk space is shown. You can disable or enable both monitoring and event alerts on each disk drive. To change threshold values, simply drag the red or yellow arrow up or down, as desired. To enable management of non-HP devices on your LAN using Toptools Device Manager, the non-HP PCs must run one or more of the management protocols SNMP, DMI 2.x, WMI or HTTP. The corresponding Agents must be obtained from the respective manufacturer. For more effective management of non-HP devices, the HP Toptools Value Pack adds features for all devices including a System Performance Advisor, and SNMP trap reception for non-HP systems with loaded MIBs. For further details, plus version information and availability of these software elements, see the 'More Information' section at the end of this Application Note. Event Alerts Event alerts are generated when certain predefined thresholds are exceeded, eliminating the need for constant visual monitoring. Two levels of alert can be generated: • Warning - this means that the situation has not yet reached critical level but the first threshold has been exceeded, so a warning is issued. • Critical - this is the most serious alarm and it indicates that the level has become critical. You can change these thresholds directly on the resource monitoring screen in the Toptools Device Manager. Sampling Intervals When monitoring resources, Toptools takes measurements in two different ways. The first, the simpler of the two, is a single measurement at an instant in time. For example, the amount of free disk space at a particular time. The second type of measurement is taken over a fixed period of time, and reflects the average value during that time. For example, CPU usage and LAN bandwidth. This type of measurement is useful when a resource, during normal use, is subject to dramatic peaks and troughs over a short period of time. In this case, an average value is a better reflection of resource utilization, and it avoids the false alerts that would be produced when resource utilization suddenly peaks for a short period. To get the average value, Toptools takes regular measurements in very short time intervals, for example, every 5 to 30 seconds. 2