FG

Why do we need to set swap space as twice big as our physical memory?

Fresh3 days ago
Mar 15, 20269472 views
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Problem

When we want to setup a linux system, there is a common a suggestion to set the swap space twice as big as your physical memory. I want to know why do we need this, and how it is this suggestion come to be?

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Fix for: Why do we need to set swap space as twice big as our physical memory?

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The short answer is "You don't have to". Depending on the kernel/system type it may make sense to size swap space like that, e.g. in FreeBSD's tuning(7) manpage we find the following rationale behind a swap size at least 2x of the physical memory si…

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