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Solaris™ Internals: Core Kernel Components by Richard McDougall, Jim Mauro

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15.3. Is All That Paging Bad for My System?

Although we stated earlier that it may be normal to have high paging and scan rates, it is likely that the page scanner will be putting too much pressure on your application's private process memory. If we scan at a rate of several hundred pages or more per second, then the amount of time that the page scanner takes to check whether a page has been accessed falls to a few seconds. This means that any pages that have not been used in the last few seconds will be taken by the page scanner when you are using the file system. This behavior can negatively affect application performance and is the reason why priority paging was introduced.

If your system seems slow while file system I/O is going on, it's ...

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