Redis Essentials

Using Swap

There is a Linux kernel parameter called swappiness that controls when the operating system will start using the swap space. This parameter can be set to values between 0 and 100. A lower value tells the kernel to use the swap space less frequently, and a higher value tells it to use the swap space more frequently. The default value is 60.

Here are some special cases of using swaps:

Value	Strategy
vm.swappiness = 0	Linux 3.5 and newer: Disables swap entirely Linux 3.4 and older: Swap only to avoid an "out of memory" condition
vm.swappiness = 1	Linux 3.5 and newer: Minimum amount of swapping without disabling it entirely
vm.swappiness = 100	Linux will swap aggressively

In a scenario where Redis needs to access from the swap ...