Page Cache, the Affair Between Memory and Files
Previously we looked at how the kernel manages virtual memory for a user process, but files and I/O were left out. This post covers the important and often misunderstood relationship between files and memory and its consequences for performance. Two serious problems must be solved by the OS when it comes to files. The first one is the mind-blowing slowness of hard drives, and disk seeks in particu
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https://blogs.oracle.com/linux/post/entry/friday_spotlight_oracle_linux_and
