CARY MILLSAP OPTIMIZING ORACLE PERFORMANCE PDF

It is the straightforward process of answering the four natural questions about performance: How long? What if? How can you optimize the process? The best way to do that is by creating a profile , which is a spanning, non-overlapping account of your time. Think of a pie chart that explains where all your time has gone. The pie chart is a good guide, but you can do more with the numbers behind the chart.

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It is the straightforward process of answering the four natural questions about performance: How long? What if? How can you optimize the process? The best way to do that is by creating a profile , which is a spanning, non-overlapping account of your time. Think of a pie chart that explains where all your time has gone. The pie chart is a good guide, but you can do more with the numbers behind the chart. Imagine that your profile looks like this:.

Now you can see exactly where your time has gone, and exactly how much time you can save. It pays to be clever: the smartest optimizations are the ones that produce tremendous benefit at low cost.

We use the same general procedure to optimize computer software performance. The real tricks are learning how to create the profile, and then learning how to attack the problems that your profile reveals. Two examples:. Often, fixing one task collaterally fixes others as well. What is Method R? In detail. Optimize that response time in the most economically efficient way.

Repeat until your system is economically optimal. The first question is How long? How long does it take? This is the first question you need answered about the performance of anything. Next is Why? Why does it take that long? What does it spend its time doing? And next, What if?

What would happen if you changed something? What would be the cost? The benefit? The risk? Finally, What else? On the second pass, the waste that before was overshadowed by bigger problems is now prominent. But can you answer it by looking at an AWR report? Would you stake your career on it? Of course not. If your task is perfectly efficient, you'll be able to see that, too. You can know in advance how much a proposed performance improvement is going to help you.

Can you explain Method R so even my boss could understand it? Who uses Method R software? Lots of companies, large and small, including companies in the Fortune , use Method R software. Oracle DBAs use Method R software to prevent performance problems by measuring application performance on test systems, and to monitor and troubleshoot user performance experiences on production systems.

What if my whole system—not just one experience—is slow? Method R sounds great for fixing performance problems, but what about preventing them? Why is there a diamond in the Method R logo? It represents the key distinction of the method itself: that there is a deterministic decision-making process that leads you—and everyone else, regardless of their experience level—from a single starting point to exactly the aspect of performance in your system that you should be focused on next.

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Optimizing Oracle Performance

Oracle system performance inefficiencies often go undetected for months or even years--even under intense scrutiny--because traditional Oracle performance analysis methods and tools are fundamentally flawed. They're unreliable and inefficient. Oracle DBAs and developers are all too familiar with the outlay of time and resources, blown budgets, missed deadlines, and marginally effective performance fiddling that is commonplace with traditional methods of Oracle performance tuning. In this crucial book, Cary Millsap, former VP of Oracle's System Performance Group, clearly and concisely explains how to use Oracle's response time statistics to diagnose and repair performance problems. Cary also shows how "queueing theory" can be applied to response time statistics to predict the impact of upgrades and other system changes.

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A Review of Optimizing Oracle Performance by Cary Millsap

Oracle system performance inefficiencies often go undetected for months or even years--even under intense scrutiny--because traditional Oracle performance analysis methods and tools are fundamentally flawed. They're unreliable and inefficient. Oracle DBAs and developers are all too familiar with the outlay of time and resources, blown budgets, missed deadlines, and marginally effective performance fiddling that is commonplace with traditional methods of Oracle performance tuning. In this crucial book, Cary Millsap, former VP of Oracle's System Performance Group, clearly and concisely explains how to use Oracle's response time statistics to diagnose and repair performance problems. Cary also shows how "queueing theory" can be applied to response time statistics to predict the impact of upgrades and other system changes. Optimizing Oracle Performance eliminates the time-consuming, trial-and-error guesswork inherent in most conventional approaches to tuning.

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