[CentOS] Re: Swap Considerations

[Scott Silva]

Mike McCarty spake the following on 3/1/2007 8:43 AM:
> Scott Silva wrote:
>>
>> Might be a little slower with file system overhead, but it is not a
>> problem to
>> do so.
> 
> I have heard that, with ext3, the extra time to use a file
> has mostly been removed.
> 
>> Is there some reason you want to use a file? IMHO a 2 gig swap
>> partition takes
>> the same space as a 2 gig swap file.
> 
> Yes, I'd like to experiment with various amounts of swap,
> and see what best fits my system. I don't want to repartition
> over and over, and reinstall repeatedly. ISTM that if I can
> fix the size of swap by using a file it would be more easily
> tuned.
> 
> But I hope the tuning isn't markedly different for using
> a swap partition and a swap file. Near a min or max, any
> smoothly changing function has a derivative near zero,
> so if the sweet point isn't very far away, it shouldn't
> make much difference to actual performance.
> 
> Mike
The best swap is un-needed swap. If you need to play with swap for performance
reasons, just get some more memory.

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