HP ML570 Novell NetWare 6 performance tuning guidelines for ProLiant servers - Page 32
introducing WebBench, NSS /CacheStats
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Novell NetWare 6 performance tuning guidelines for ProLiant servers introducing WebBench Parameters that had positive effects on the overall throughput performance of the NetBench test under NetWare 6 are described in table 11. table 11. NetBench test parameters NSS Value CacheBalance NoSalvage Description Set what percentage of free memory NSS will use for its buffer cache [Value=85, Range = 1 - 99]. To view the default values, type NSS /CacheStats Disable salvage of deleted files on the given volume. The current version of this benchmark is WebBench 4.1. The performance results presented in this section are based on version 4.1. WebBench is a licensed Ziff-Davis Media Benchmark program that measures the performance of Web servers. It uses LAN attached clients to issue server requests for static files or a combination of static and dynamic executables. The static and/or dynamic executables are run in order to produce the data the server returns to the client. It is used to measure the performance of different Web server software packages by running WebBench against them on identical server hardware. Similarly, it is also used to measure the performance of different server hardware by running a given Web server package and WebBench against the hardware. For more information on how to obtain a free copy of WebBench, visit: www.webbench.com/benchmarks/webbench/webbench.asp?visitor=X. Typically, the I/O workload characteristics of a website are varied based on the content of the site (static or dynamic) and the type of Web application running on the site. For example, if the site hosts mainly static content, the network, memory, and processor are subjected to intense pressure. Similarly, if the content of the site is dynamic, memory, processor, disk, and network are also affected. On the other hand, if it is e-commerce sites where compute-intensive secure socket layer (SSL) transactions are involved, then processor, memory, disk, and the network come under intense pressure. Knowledge of these subtle but significant differences of the workload characteristics is helpful in figuring out and isolating performance bottlenecks in your environment. NetWare 6 has several tools and utilities for monitoring the performance of the above subsystems. The major ones include: • NetWare Monitor • NetWare Remote Manager • Vtune You should regularly monitor the subsystems in order to identify potential bottlenecks in your operating environment. Depending on the types of transactions on your Web server, the processor could easily become the bottleneck and therefore should be monitored regularly as well. 32