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The Economy of Performance Monitoring

Article from ADMIN 06/2011

By ADMIN Magazine

Performance monitoring rarely evokes the gut-wrenching debates or religious commentary that other topics do, but it's a very important part of the system administrator's job. System performance is an essential, but often neglected, metric, even in our new disposable hardware world.

For many admins, performance monitoring consists of listening to user complaints about slowness, sluggishness, or some equally subjective description. Sometimes the descriptions don't help much at all. What you really want to know is, what is causing the sluggishness?

Today, we have better tools than just our intuition and opinions. We also have more systems, virtual and physical, than we can effectively manage psychically. You need software tools that measure system, network, and application performance in an objective way. You need real data with which to make decisions. In the "old" days, if a system had performance problems, we added more RAM. If a disk filled to near capacity, we replaced it with a larger one. If the network was slow, we rebooted something.

To make the case for lowering costs via performance monitoring, you have to be creative and select the software that makes economic sense for your company. The information you'll need to gather falls into three categories: historical data, performance trends, and capacity projections. You'll need all three for a complete picture of performance. Be aware, however, that your specific circumstances might dictate that you use a variety of tools to achieve your goals. Don't allow the use of multiple products to deter you from exploring free software alternatives.

Open source software (OSS) has thankfully replaced the old and outdated business adage, "You have to spend money to make money." You can do a lot with free software – and you should. OSS has advantages other than price alone. Open source tools are more likely to run on older or decommissioned hardware, and you will have

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