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TechTip: New Performance Tools to Keep Your System Snappy

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IBM Navigator for i adds a new bird’s-eye-view performance interface in IBM i 7.3.

 

When talking about IBM i, it’s often stated that it’s the most securable operating system available, not necessarily the most secure. While IBM gives you the tools to ensure your system is secure, the human element must be considered. This is why it’s securable. Each operating system depends entirely on the system administrator to ensure doors are locked and windows are shut. This fact is true about many other aspects of the IBM i operating system, including performance. A system will perform as well as it’s configured to.

As part of the IBM i 7.3 release, IBM has released a number of new features to make identifying performance problems more obvious to the average system administrator. Most notably and obviously evident is the new Dashboard feature included inside IBM Navigator for i. Gone is the old “Welcome” page, which really offered nothing to a user. Instead, Dashboard is the initial page loaded once you log into Navigator for i, so you can’t miss it. You don’t need to turn it on or configure it. It’s just there as a great overview of the IBM i partition’s performance data.

Dashboard gives you a realtime view of CPU Utilization, Disk Pool Usage, Page Faults, Active Jobs, Disk Usage, and Operator Messages, each within it’s own mini pane. The Dashboard updates itself automatically by default; however, you may switch that to manual by a click of a button. You can also change the properties of automatic update by way of interval (how frequently the graph data is updated) and duration (length of time data is collected in the interval). The default data refresh is every second.

100716PitcherFig1

Figure 1: Dashboard in Navigator for i gives a bird's-eye view of performance.

Users can set thresholds by which to view the data. For instance, if you want the CPU line graph to display green when under 60%, yellow from 60-80%, and red from 81-100% utilization, it’s just a matter of dragging sliders on a slider bar. It’s very simple to customize based on your environment.

But the real value of Dashboard is the ability to right-click and get a contextual menu. If you right-click CPU, you can choose View Monitors, Investigate Monitor Data, or Investigate CPU data. It has the ability to take you directly into Performance Data Investigator and System Monitors so you can drill down and find the root causes of an underperforming metric. Dashboard is a simple starting point to identify problems and offers the ability to delve further into the already robust performance tools included in Navigator.

Rather than explain every right-click option in detail, I borrowed the following chart from the IBM i developerWorks page for Navigator. IBM was nice enough to create a very descriptive infographic about the drill-down options for Dashboard. But once you’re inside PDI, your choices can carry you even further down the path to identifying those problem root causes.

100716PitcherFig2

Figure 2: These are the drill-down options for Dashboard in Navigator for i.

Since this is Navigator, it’s got all the bells and whistles and polish of an administration tool. For the administrator on the move, the Dashboard feature is also included in IBM i Access for Mobile. This version works very similarly to the Navigator Dashboard; however, like all features of the mobile version of IBM i Access, it’s been optimized to fit on smaller screens. For the full experience, I’d recommend the full Navigator for i interface for any heavy lifting.

Navigator for i is here in a big way. We need to be aware that all new features are going to Navigator for i, and we need to take advantage of them. Performance monitoring in Navigator, while extremely valuable, is just the tip of the iceberg.

Steve Pitcher
Steve Pitcher is a specialist in IBM i and IBM Lotus Domino solutions since 2001. Visit Steve's website, follow his Twitter account, or contact him directly at steven.carl.pitcher@gmail.com.

Website: blog.itechsol.com 
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