[CentOS] Re: changing swap size

Thu Mar 29 06:21:46 UTC 2007
John Summerfield <debian at herakles.homelinux.org>

John R Pierce wrote:
> John Summerfield wrote:
>> I don't know what advantage swap partitions have over swap files.
>> Swap files can be created and added as any time.
> they are always contiguous, and have no overhead in inode and cluster 
> mapping.

Contiguous is irrelevant; unless one has disk dedicated to swap, the 
partition's never close to anything important.

Is the rest something that matters for 2.6 kernels?

See http://en.wikipedia.org/wiki/Virtual_memory
[edit] Swapping in the Linux and BSD operating systems

> that said, the actual swap usage on a non-overloaded system -should- be 
> close to zero.

Indeed. And if it's high, a good way to reduce it is to add RAM. It 
escapes me though, why I should add swap too.



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