Ubuntu之To reduce unnecessary disk I/O due to swappiness

最新推荐文章于 2025-05-11 16:47:43 发布

最新推荐文章于 2025-05-11 16:47:43 发布 · 111 阅读

本文介绍如何在Ubuntu系统中调整vm.swappiness配置值来控制内存使用与磁盘交换的平衡点，通过设置较低的值减少不必要的磁盘I/O操作。

In Ubuntu, there is a configuration value called vm.swappiness. It will control the threshold of memory usage. When the threshold reached, system will start the swap mechanism to swap data from memory to disk. For example, if you set vm.swappiness=65 and your computer has 4GB memory, it means when your system remains 4GB*65%=2.6GB, it will start to swap even if you only use 1.4G memory. Thus, I suggest you to set vm.swappiness to lower value, for exmpale, vm.swappiness=10, to reduce unnecessary disk I/O.

How to?
In terminal
1.# gksudo gedit /etc/sysctl.con
2.Add vm.swappiness=10 to the end of the file
3.Reboot computer

参考https://help.ubuntu.com/community/SwapFaq