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Chapter 3. The Registry > Compacting the Registry

3.9. Compacting the Registry

As you may have noticed, your Registry can become quite large. This is due, in part, to the empty space inside your Registry files. If you're familiar with the way data is stored in the Registry, you know that the Registry is a database. As with all databases, when information is removed or added, the database file is not rewritten entirely (in order to improve performance). Instead, new information is simply appended to the end of the file, and gaps are left in the file where information has been removed. After a lot of use, this can cause the files that make up the Registry to become enormous. See Figure 3-3 for a diagram of this process.

Figure 3-3. The process by which the Registry accumulates empty space



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