Page cache recovery method, device and equipment and storage medium

Abstract

The invention discloses a page cache recovery method, device and equipment and a storage medium. The method comprises the steps of obtaining a first list containing cache pages to be recycled; settinga list resource lock for the first list; screening a target to-be-recycled cache page which is not referenced by the thread in the first list; transferring the target cache page to be recycled from the first list to a second list, and releasing a list resource lock of the first list; and performing resource release operation on the target to-be-recycled cache page in the second list. According tothe method, the overall recovery efficiency of the cache page is relatively ensured, and then the overall data processing performance of the file system is ensured. In addition, the invention furtherprovides a page cache recovery device and equipment and a storage medium, and the beneficial effects are the same as described above.

Description

technical field [0001] The present application relates to the field of system maintenance, in particular to a page cache recovery method, device, equipment and storage medium. Background technique [0002] In the Linux system kernel, page cache (page cache) is an important caching method in the file system, which is directly related to the performance of the file system. One of the indicators to measure the quality of page cache is the ratio of effective cache pages to all cache pages , effective cache pages refer to the cache pages that are actually accessed. If the ratio of effective cache pages is low, part of the disk bandwidth will be wasted on reading useless cache pages, and useless cache pages will indirectly lead to system memory tension, and finally The operating performance of the system may be seriously affected. However, the current overall recovery efficiency for cached pages is often low, resulting in a low proportion of valid cached pages per unit time, maki...

AI Technical Summary

Problems solved by technology

[0002] In the Linux system kernel, page cache (page cache) is an important caching method in the file system, which is directly related to the performance of the file system. One of the indicators to measure the quality of page cache is the ratio of effective cache pages to all cache pages , effective cache pages refer to the cache pages that are actually accessed. If the ratio of effective cache pages is low, part of the disk bandwidth will be wasted on reading useless cache pages, and useless cache pages will indirectly lead to system memory tension, and finally May seriously affect system performance

However, the current overall recycling efficiency for cached pages is often low, resulting in a low proportion of valid cached pages per unit time, making it difficult to ensure the overall data processing performance of the file system

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