Linux Os Swappiness, Follow our step-by-step guide to adjust this kernel parameter and enhance your Apr 23, 2025 · Just installed Ubuntu? Changing Swappiness can boost performance! But what is it, why change it, and how? Let’s keep it simple and get it done. swappiness`. May 4, 2020 · One way to guard against out-of-memory errors in applications is to add some swap space to your server. The default swappiness value in most Linux distributions is 60, which means the system starts swapping out processes when the available memory falls below 40%. Another option available on Linux systems is to ensure that the sysctl value vm. Typically, most Linux systems default to a swappiness value of 60. Swap space, for those who might not know, is a portion of your hard drive that the operating system can use as virtual memory when your RAM (Random Access Memory) is full. There's a lot of confusion about what this setting controls. Jun 9, 2021 · Your Linux OS contains a swappiness value configuration setting. Apr 27, 2025 · The vm. Dec 8, 2025 · In this guide, we’ll demystify swappiness, explain why and when you might want to change it, and walk through step-by-step methods to adjust it temporarily or permanently. Jul 27, 2022 · swappiness can have a value of between 0 and 100 swappiness=0 tells the kernel to avoid swapping processes out of physical memory for as long as possible swappiness=100 tells the kernel to aggressively swap processes out of physical memory and move them to swap cache The default setting in Ubuntu is swappiness=60. This reduces the kernel’s tendency to swap and should not lead to swapping under normal circumstances, while still allowing the whole system to swap in emergency conditions. Mar 18, 2024 · In this tutorial, we’ll talk about swappiness and its current default value in the Linux kernel. Nov 15, 2025 · Understanding Swappiness At its core, swappiness is a Linux kernel parameter that controls how aggressively the system uses swap space. Dec 10, 2025 · This article explores swappiness in Linux and the role it has in optimizing memory management. A swappiness setting of zero means that the disk will be avoided unless absolutely necessary (you run out of memory), while a swappiness setting of 100 means that programs will be swapped to disk almost instantly. Apr 26, 2025 · Swappiness is a Linux kernel parameter that controls the balance between swapping out idle processes and using available RAM memory. Sep 13, 2022 · The value of vm. Jan 29, 2024 · Swappiness in Linux has nothing to do with how much RAM is used before swapping starts. Jan 29, 2026 · Conservative ครับ Debian + Xfce จูนนิดหน่อยเพิ่ม zram + vm. swappiness ยิ่งเครื่องสเปคดีหน่อยอย่างลื่น Mësoni si të konfiguroni swappiness në Linux, të zvogëloni përdorimin e SWAP dhe të përmirësoni performancën duke rregulluar siç duhet memorien virtuale. Sep 13, 2021 · Learn how to change swappiness in Linux to optimize system performance. Jan 17, 2026 · The minimal reasonable swappiness is 1 because a swappiness of 0 causes an extreme bias against anonymous page eviction, preventing them from being scanned for reclaiming or swapping except in the most extreme cases of memory contention. . swappiness setting dictates how eagerly the Linux kernel will move anonymous memory pages to swap compared to discarding data from the file cache. See how to fine-tune the value in this guide. swappiness option is a modifier that changes the balance between swapping out file cache pages in favour of anonymous pages. This article provides an in-depth explanation of swappiness. Change advanced system parameters with extra caution. swappiness). Using the sysctl command, you can easily check the active swappiness setting and gain insights into the system’s memory management behavior. First, we go over the general swap strategy of the Linux kernel. Feb 13, 2012 · 698 The Linux kernel provides a tweakable setting that controls how often the swap file is used, called swappiness. Dec 4, 2025 · zram, formerly called compcache, is a Linux kernel module for creating a compressed block device in RAM, i. Based on my online reading, I discovered that 10% is a better value for vm. Introduction Swappiness is a Linux kernel parameter commonly linked to enhancing system performance. This blog explains `vm. This setting influences how aggressively the kernel moves data between RAM and swap space—a decision that significantly impacts system performance. In Linux system administration, kernel parameters provide fine-grained control over system behavior. I checked the current swappiness setting on my system and it was set to the default. swappiness modifier is deducted (file_prio=200-vm. However, the parameter does not directly improve performance, and a high swappiness value can have unfavorable outcomes. The most common incorrect description of swappiness is that it set Dec 10, 2025 · This article explores swappiness in Linux and the role it has in optimizing memory management. The file cache is given an arbitrary priority value of 200 from which vm. Anonymous pages, by default, start out with 60 (anon_prio=vm. Jan 26, 2024 · This will display the current swappiness value, which is typically set to 60 by default in many Linux distributions. swappiness`, its practical usage, best practices The swappiness is what hints the kernel what it should prefer. swappiness is set to 1. e. a RAM disk with on-the-fly disk compression. A value of "0" tells the kernel to avoid swapping out anon pages as much as possible, and to always clear the file-back memory/cache to make more space. The existence of this value continues to brew many misconceptions about its intended system functionality. We tell you what it really is. Swapping is a technique where data in Random Access Memory(RAM) is written to a special location on your hard disk---either a swap partition or a swap file---to free up RAM. The vm. How Do I Change the Swappiness Value? To temporarily change the swappiness value, use the command sudo sysctl vm. swappiness is used in a formula that determines multiple aspects of how swap is performed by the Linux kernel. swappiness=<value>, replacing <value> with your desired swappiness level. You will learn how swapping works and how to adjust […] Swappiness is a property for the Linux kernel that changes the balance between swapping out runtime memory, as opposed to dropping pages from the system page cache. Linux has a setting called the swappiness value. swappiness for many Linux systems with large amounts of RAM. One critical parameter affecting memory management is `vm. In this guide, we will cover how to add a swap file t… Nov 22, 2024 · Learn to manage Linux swap memory effectively! Discover what swappiness is, how it affects system performance, and how to modify it for optimal results. Oct 22, 2025 · Explore the steps to retrieve and display the current swappiness value of a Linux system. The block device created with zram can then be used for swap or as a general-purpose RAM disk. rld5a, djym, gbvgye, qtrpt, bmsv, smtwt, if41d, scjs, jszk, tdegi,