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The disk buffer is usually quite small, ranging between 8 MB to 4 GB, and the page cache is generally all unused main memory. While data in the page cache is reused multiple times, the data in the disk buffer is rarely reused. [3] In this sense, the terms disk cache and cache buffer are misnomers; the embedded controller's memory is more ...
Pages in the page cache modified after being brought in are called dirty pages. [5] Since non-dirty pages in the page cache have identical copies in secondary storage (e.g. hard disk drive or solid-state drive), discarding and reusing their space is much quicker than paging out application memory, and is often preferred over flushing the dirty pages into secondary storage and reusing their space.
In computer science, a data buffer (or just buffer) is a region of memory used to store data temporarily while it is being moved from one place to another. Typically, the data is stored in a buffer as it is retrieved from an input device (such as a microphone) or just before it is sent to an output device (such as speakers); however, a buffer may be used when data is moved between processes ...
The database is placed in a quiescent state by allowing current active transactions to complete and then flushing modified buffers from cache to the stable database. [7] During a quiesced backup, updating transactions are not permitted and attempts to execute database transactions raise a database exception.
While the disk buffer, which is an integrated part of the hard disk drive or solid state drive, is sometimes misleadingly referred to as disk cache, its main functions are write sequencing and read prefetching. High-end disk controllers often have their own on-board cache for the hard disk drive's data blocks.
Use the Disk Cleanup function on Windows. Windows has a built-in feature that helps you free up disk space; it’s called Disk Cleanup. Just click the Start button and then search for it by name.
“Flushing” doesn’t appear to be a common name for this traffic control tactic. Kruea said that police also call it “turning traffic off the boulevard” or “turn the boulevard.” ...
Disk cache may refer to: Disk buffer , the small amount of RAM embedded on a hard disk drive, used to store the data going to and coming from the disk platters Page cache , the cache of data residing on a storage device, kept by the operating systems and stored in unused main memory