User manual SONY VAIO VGN-TZ2500N DATASHEET

[. . . ] For more effective management of non-SONY devices, the SONY Toptools Value Pack adds features for all devices including a System Performance Advisor, and SNMP trap reception for non-SONY 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. 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. [. . . ] Another example is when the PC has been started but the user has not yet logged on. In some Windows operating systems, the login window that is displayed uses 100% of processor time until the user logs in. Average Value Time Sample Values These sample values are used to provide an average value over a much longer window of time, for example, over a period of an hour. It is this average value which is used to trigger alerts. Memory Usage There are three useful measurements provided: swap activity, swap file usage, and physical memory. Two of these measurements concern the Windows swap file. The swap file is a large file that the operating system uses to switch memory chunks between physical memory and the hard disk. In this way, virtual memory is created, extending the PC's available memory significantly. The PC can run much larger applications and process larger data chunks than it could without a swap file. Which Resources can be Monitored? CPU Usage The remote PC's processor usage can be monitored. The value shows the percentage of time that the processor is busy (not idle). This measurement is taken over a fixed period of time, and reflects the processor's average usage during that time. Resource Monitoring Example 2 This shows memory usage on a single remote Vectra PC It shows physical memory usage, swap file usage, and swap activity. You can disable or enable monitoring and event alerts for these measures (except on physical memory usage). To change thresholds for the swap activity, simply enter new values in the space provided and click Save Settings. 3 Swap Activity This measurement shows the average number of pages per second that are read from or written to the Windows swap file. For example, if there is not enough free disk space on one of the logical disks, the PC may benefit from a different disk partition setup or even a disk drive upgrade. Network Usage Three measurements are provided: LAN I/O packets, LAN I/O error rate, and LAN bandwidth utilization. These measurements are provided for each LAN card installed in the PC. These measurements are all taken over a fixed period of time, and reflect the average value during that time. LAN I/O Packets This measurement shows the number of network packets received and sent by the LAN card. It can be useful for determining that the PC's network connection is working correctly, as well as for showing network traffic patterns. This measurement is only used in Toptools Value Pack and is only available for PCs running Windows NT or Windows 2000. Disk Space The current free disk space and total disk space is shown for each logical disk (that is, for each hard disk partition on the PC). Performance Advisor Example 2 This shows a remote PC's memory usage over the last hour. You can also view the memory usage over the last day, the last week, and the last month. Similar trend analysis information is available for CPU, disk input/output, and disk capacity. 5 LAN I/O Error Rate This measurement shows the percentage of network packets sent and received that contained errors. This is useful for spotting network errors and for isolating problem areas. For example, a very high error rate between a specific PC and a hub could point to a faulty network cable between these two devices. This measurement is available for PCs running either Windows NT or Windows 200 which have the Microsoft SNMP Service installed. [. . . ] However, even this task requires very little network bandwidth. There are two cases in which no monitoring is done by the remote PCs, and therefore zero system capacity is used. Firstly, if resource monitoring is disabled, and secondly, if the remote PC goes into standby or sleep mode. Toptools allows the PC to go into standby or sleep mode, rather than waking it up to continue monitoring its resources. [. . . ]