![]() ![]() ![]() How to Clear the Buffer CacheĪnother way to limit the amount of memory that buffer caches use is via control groups (also referred to as cgroups). In the following sections, we’ll examine how to mitigate that side-effect by manually clearing those caches and restricting the maximum size that they can occupy. This can add additional latency when we want to reclaim that memory and is therefore negatively impacting the running processes. While using buffer caches can greatly improve the overall performance, they can sometimes claim a significant part of the main memory. It then does some bookkeeping so that it knows which piece of data is cached, and it schedules regular flushes of that data onto the actual disks. For this reason, instead of going to the disk every time, Linux performs those write operations to those buffer caches. For this reason, Linux tries to minimize the number of I/O operations with those buffer caches.īuffer caches live in memory, thus reading and writing to them is much faster compared to disks. The speed at which data is transferred varies depending on the medium, and it greatly affects the overall performance and the response times experienced by users. At its core, every computer program reads and writes data. ![]()
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January 2023
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