What is the page cache?
Page cache, also called disk cache, is a computer random memory (RAM) area that is used to hold and adjust the data that are stored on a hard disk or other permanent storage device. The operating system uses a speed cache for speed and efficiency because it is faster to read and write information in RAM than to access the hard disk areas. In most cases, the mechanism used for the field of storage in the hard disk cache is automatically controlled by the operating system, and users or applications may not be managed or otherwise processed. Depending on the operating system, storage in the cache is sometimes used for any reading and writing from a hard drive regardless of the amount of reading or written information. Another attribute of cache -specific pages is that after a given time period, the cache is automatically rinsed from unused information to maintain a large free memory fundother applications.
When a computer program requires information from a traditional hard disk, a relatively time -consuming process can occur to obtain information. The hard disk is media with random access, so it must physically move the reader to a disk location that corresponds to the location where the data block is located. After this happens, information is read to a computer where it can be processed. For reading consecutive blocks of information from the unit, a greater movement of a physical reader or head must be made. This process can be even more time consuming to write large files to the disk.
Computer RAM, on the other hand, does not require a physical reader and is located very close to the central unit for processing (CPU) of the computer. RAM reading and writing is much faster than reading and writing on a hard drive. Page cache is a way to minimize the amount of physical reading and writing that must be made on a hard disk.
the process is done by reading in a certain amount of information from the solidDrive in request. The amount of data that is stored in the cache of the page in RAM is determined by the size of the cache and not necessarily according to the amount of information required. Once the data from the unit is in the RAM, they remain in RAM until they are already needed, or up to the point where any data changes in the cache need to be written or rinsed to the hard drive to be permanently stored. The cache flush can occur when the memory must be released after a certain period of time or even if necessary by performing a user order.
Page cache is most often used to store files that do not change, but must be referred to continuously, such as executable files and libraries for applications. To increase the speed and ensure the implementation of applications from the cache, some systems indicate the memory used for executable files as EAD rip. The use of a cache can actually increase the lifetime of the hard disk by reducing the possibility of threshing disk from multiple reading and writing in shortthe time period.