HP ML570 Novell NetWare 6 performance tuning guidelines for ProLiant servers - Page 19

Novell NetWare 6 performance tuning guidelines for ProLiant servers 2. Check the time sampling interval of the trend update, and then click on Draw Selected Graphs for a graphical display of the selected element as shown in the next figure. tips and tricks introducing NetWare 6 Use the following tips to improve the disk subsystem performance. The processor utilization parameters to check are: • processor utilization - a server's total processing capacity used during the last second (listed as a percentage). Check the processor utilization regularly. If the utilization is > 90% over a sustained period of time, it probably indicates a processor bottleneck. • watch for errant NetWare Loadable Modules (NLMs). • make sure the current service processes counter is adequate. • use Direct Access Memory (DMA) devices. • upgrade or add another processor, if the processor is the bottleneck. There are several tools available under NetWare for monitoring processor subsystem performance and the general health of the server. Refer to the NetWare Performance Monitoring Tools section of this document for more examples. According to Novell, the current version of NetWare 6 is a multithreaded, multitasking, MP-enabled operating system. A thread is a stream of control that executes instructions independently. This stream of instructions consists of tasks in the thread. A multithreaded program is where two or more threads can execute concurrently. Typically, a multithreaded program will not automatically run on more than one processor unless specified by the code developer. A multithreaded operating system with multitasking capability on the other hand can execute threads from different multithreaded programs 19