October 2000
Intermediate to advanced
704 pages
18h 44m
English
Content preview from Solaris™ Internals: Core Kernel Components
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13.6. The File System Flush Daemon
The fsflush process writes modified pages to disk at regular intervals. The fsflush process scans through physical memory looking for dirty pages. When it finds one, it initiates a write (or putpage) operation on that page.
The fsflush process is launched by default every 5 seconds and looks for pages that have been modified (the modified bit is set in the page structure) more than 30 seconds ago. If a page has been modified, then a page-out is scheduled for that page, but without the free flag so the page remains in memory. The fsflush daemon flushes both data pages and inodes by default. Table 13-15 describes the parameters that affect the behavior of fsflush.
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