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To access the contents, click the chapter and section titles.
Oracle Performance Tuning and Optimization
Unit ConversionsMost people are familiar with the units of measurement commonly used in the computer industry. But to ensure that all readers of this book start out on the same foot, the following sections give quick overviews of these terms. Powers of 10Here is a quick review for those who may have forgotten these conversions:
These are the typical ranges of numbers used in computer technology, although you dont really see pico referred to very often. Speeds in terms of picoseconds are useful only if you are looking at the internal operations of the CPU chips themselves. At the speed of light, it takes approximately 0.3 picosecond to travel 1 millimeter. Storage UnitsData is stored in the computer in a binary form. The units used to refer to this binary data are as follows:
It is not uncommon today to hear some large data warehousing sites talk in terms of terabytes. In the next few years, we will probably hear of systems using storage in the tens and hundreds of terabytes. SummaryThis chapter defined and described various concepts with the intent of preparing you for the upcoming chapters. Be sure to look in the glossary for any other terms with which you are not entirely familiar.
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