Frequent Question: What Is Linux Page Cache?
Contents the Page Cache Is the Main Disk Cache Used by the Linux Kernel. in Most Cases, the Kernel Refers to the Page Cache When Reading from or Writing to...
The page cache is the main disk cache used by the Linux kernel. In most cases, the kernel refers to the page cache when reading from or writing to disk. … If there is enough free memory, the page is kept in the cache for an indefinite period of time and can then be reused by other processes without accessing the disk.
How does page cache work in Linux?
Under Linux, the Page Cache accelerates many accesses to files on non volatile storage. This happens because, when it first reads from or writes to data media like hard drives, Linux also stores data in unused areas of memory, which acts as a cache.
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What is Linux buffer cache?
Buffers are in-memory block I/O buffers. They are relatively short-lived. Prior to Linux kernel version 2.4, Linux had separate page and buffer caches. Since 2.4, the page and buffer cache are unified and Buffers is raw disk blocks not represented in the page cache—i.e., not file data.
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