On Tue, 2 May 2006 00:21:08 -0400 Charles Shannon Hendrix wrote:
> Tue, 11 Apr 2006 @ 01:33 -0700, Linda Walsh said:
>
> > Hmmm, not to be contrary, but I have a 1GB system that refuses to swap
> > during large file i/o operations. For the first time in a *long* time,
> > I read someone's suggestion to increase swappiness -- I did, to 75 or 80,
> > (I've booted since then, so it's back to 60 and no swap usage) and some of
> > the programs that rarely run actually swapped. It was great! I finally had
> > more memory for file i/o operations.
>
> It's great if you actually need the file data that gets stored.
>
> > Maybe you are telling the system to "feel free" to use swap by having a
> > large swap file?
>
> I don't believe that matters, and certainly doesn't seem to affect my
> own system.
>
> If I use a smaller swap file, I just run out faster.
>
> Is your experience different?
>
> > I agree. Try getting rid of your swap file entirely -- your system
> > will still run unless you are overloading memory, but you have a Gig.
> > How much do you need to keep in memory? Sure, if/when I get a 4-way
> > CPU (I have a 2-cpu setup now), I might go up to 4G, but I might be
> > running multiple virtual machines too!
>
> Sure it will run, but I *want* swap to be used to remove unused
> programs.
>
> My current problem is that *useful* program code is being swapped out and
> being replaced by *useless* cached file data.
>
> > You might try the "cfq" block i/o algorithm. Then you can
> > ionice down the disk priority of background processes (though you need
> > to be root to reduce ionice levels at this point, unlike cpu nice).
>
> I've not seen ionice.
It's hidden^w embedded in Documentation/block/ioprio.txt ...
---
~Randy
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
