[CentOS] Swap

Rodrigo Barbosa rodrigob at suespammers.org
Mon Jun 5 20:51:03 UTC 2006


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On Mon, Jun 05, 2006 at 04:28:04PM -0400, Max H. wrote:
> Sam Drinkard wrote:
> >I assume then, with swappiness set to 0, *if* the system does happen to 
> >need some extra pages, then it *will* go into swap, but only if all 
> >memory is exhausted?  Zat sound right?
> 
> From what I know about it, yes your statement is correct. If you have 
> swap turned off though, yeah your system is going to freak out for sure. 
> Some people seem to run with no swap at all, but I was always taught to 
> not do so, I guess it's personal preference and experiences.
> 
> I've played with different swappiness settings on my laptop, but I never 
> really noticed any difference between the default that CentOS has, and 
> whatever values I used. I tried it at 10 and 90 (I believe the default 
> is 80), at least that's what I have mine set to), and I really didn't 
> notice any difference at all.
> 
> I've never run out of memory though, at 1GB in my laptop, I never come 
> close to exhausting all of it.
> 
> Perhaps others have better results with playing with swappiness values.

It is kind of interesting, but I never noticed much difference from the
default value (thats 60, by the way) until I set swappiness to 0.
The difference between 10 and 60 is barely noticeable, tho. You are
right on that regard.

I have 768MB on my laptop, and I really use it. Meaning spamd, mysql,
firefox, openoffice and some nuts and bolts.

- -- 
Rodrigo Barbosa <rodrigob at suespammers.org>
"Quid quid Latine dictum sit, altum viditur"
"Be excellent to each other ..." - Bill & Ted (Wyld Stallyns)

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