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

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15.4. Paging Parameters That Affect File System Performance

When priority paging is enabled, you will notice that the file system scan rate is higher. Because the page scanner must skip over process private memory and executables, it needs to scan more pages before it finds file pages that it can steal. High scan rates are always found on systems that make heavy use of the file system and so should not be used as a factor for determining memory shortage. If you have Solaris 7, then the memstat command will reveal if you are paging to the swap device; such paging suggests that you are short of memory.

If you have high file system activity, then you will find that the scanner parameters are insufficient and will limit file system performance. To ...

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